Is it possible to know the future through a biological mechanism?

[Arctic Fox]

So, if I'm thinking of this correctly...

The faster we travel, the slower time progresses for those traveling.
We go faster, time for us slows down.


Just for ease of example, let's say the travelers are traveling exactly at c.

They travel toward a star that is 10LY away - so at c, those who are still at the launch site should expect the travelers to get there in 10 years.

But how long does it seem to take for the travelers themselves - since time has slowed down for them?

 

[russ_watters]

It would pretty much seem instantaneous. But you'd have to be careful - you might pick a main sequence star to fly to and and instant later it would go supernova on you!

 

[Arctic Fox]

Instantaneous? Does that mean that time seems to stop completely for the travelers when they travel at light speed? So traveling >c would reverse time... means I could throw away those beauty cream product?

What about the computers onboard - would they experience the time differential; would the computer clocks slow down as well?

 

[TheStatutoryApe]

I don't get the instantaneous thing.
From what I understand of Relativity each would have it's own relative time frame based on the factors of velocity and relation to gravity fields. Thinking about it I guess the velocity at the speed of light could compress the time experience, human and machine alike, to something near instantaneous but I'd imagine the crew would have to somehow be shielded from the actual experience of that velocity in which case the time experience would be based on whatever means you used to buffer the crew and machines from the velocity experience.
And now my brain hurts lol.
I think that the the time experience of the crew and machines once outside of the gravitational field becomes more a factor of velocity. The differential between the launch and landing sites is probably more a factor of gravity.

 

[russ_watters]

Remember guys, we're talking hypothetical here. In reality you can't reach C. If you went very, very close to C, your time would slow relative to an outside observer so much that you could get anywhere in the universe almost instantaneously. Due to length contraction, the universe would look slightly larger than a single point to you.

And remember, this is time itself we're talking - a computer clock and you will experience the same thing: everything would appear normal to you inside your ship, but look out the window and you'll see the entire universe zip by.

 

[MonstersFromTheId]

Hypothetical as all hell ;-)

With respect I'm not sure you guys really quite have a feeling for the implications of what Russ is explaining to you when he says this is all hypothetical 'cause nothing could move at the speed of light (at least nothing with mass). Since I didn't either maybe I can help.
Imagine something REALLY tiny and insignificant, like just a single solitary nose hair. You can just blow on something that light and it'll fly off a table top right? In other words it's easy to move at everyday speeds 'cause it doesn't weigh much. A single breath can move it.
Now I'm making these numbers up (Russ could probably provide real numbers), but these fake ones accurately show in general HOW this works.
O.k. As things move faster they get heavier (more accurately more massive or difficult to move but you get the idea).
So now at rest that nose hair weighs practically nothing and a single breath can move it.
But as its speed increases its mass starts to go up LIKE CRAZY.
At a half light speed, that same nose hair now weighs as much, and is as difficult to push, as a railroad car.
(so forget about it moving when you blow on it, you're now going to need something with several THOUSAND horse power to push it any faster)
At three quarters light speed it weighs as much and is as difficult to push as an entire planet.
(At this point there isn't an engine in existence, and none I know of even on the drawing boards, big enough to move it any faster)
At seven eighths light speed it weighs as much and is as difficult to push as an entire GALAXY.
At fifteen sixteenths the speed of light that very same tiny nose hair weighs as much and is as difficult to push as OUR ENTIRE FRIGGING UNIVERSE!
And at thirty one thirty seconds light speed it now weighs as much and would be as difficult to push as a gazillion trillion million universes!
At this point you STILL haven't reached the speed of light yet, you're just close, and even if you could come up with some fantasy "matter/antimatter warp drive engine" powerful enough to push "a gazillion trillion million universes" what in the living HELL would you use to run that engine? ALL the energy in our ENTIRE universe, wouldn't even be the slightest fraction of the amount of energy you'd need to so much as start that puppy let alone get it to idle for a minute or two.
And you have to keep in mind that what we're talking about here is what it would take just to push a tiny little nose hair up to light speed, so try to imagine what it would take to move an entire human being, let alone some kind of ship full of people and equipment up to those impossibe to attain speeds.
So this isn't like "breaking the sound barrier" in that maybe, someday in the future, somebody could come up with an engine powerful enough to drive a "starship" up to the speed of light, because it's not a case of not being sophisticated enough technologically to do it, it's a case of something that literally CAN NOT BE DONE, not now, not a thousand years from now, or a million. What the physics is telling you is that the whole idea of trying to build a "starship" with "matter/anti-matter engines", or whatever, powerful enough to push it to light speed (let alone faster), is simply a dead end approach no matter how much time you spend on it, so if you want to get to other stars in less than a single lifetime, you're going to have to come up with some other way of doing it other than pushing a ship with any kind of powerful star drive engine.

So when Russ says this is all "hypothetical" he means way waaaaay beyond practical, and well into the zone of talking about the aerodynamic load requirements of a pixie's wings in a discussion about how to use pixies to air lift cement trucks into the jungles of the Congo.

When you ask "what happens when you travel at the speed of light", you're actually asking a nonsensical question about "what happens to something when it gets bigger than infinitely big?". There's no such thing as "BIGGER than infinitely big". The question doesn't really make sense. So when you try to calculate what happens the answers don't make any more sense than the question does, which is why you get answers like...
Time stops from your perspective.
You become thinner than having no thickness at all in the direction of travel.
And your mass approaches infinity.

Zat help at all?

 

[juju]

HI,

If we eventually find a way to tunnel through the light barrier, what will we find?

Will the effective inertial mass decrease with increasing velocity?

Will time speed up again with increasing velocity?

juju

 

[MonstersFromTheId]

Again, with respect...

... I think you're missing the point juju.

The whole point is that there really is no such thing as "tunneling through the light barrier".
There's no kind of "barrier" to have to "tunnel through". When you talk about "barriers" it implies that there's something you can figure out how to break down or blast your way through. But there is no "barrier" to overcome. At least not in any kind of physical sense.

I'm not trying to make fun of you, or make you look dumb, *I* sure didn't understand this whole idea at first either.
Maybe if you try to explain to us what you picture in your head as the "light barrier" that you're trying to "tunnel through" one of us can help.

 

[Louis Cypher]

It is eminantly possible to travel at light speed after all light does it and it has mass if you instantaneously achieve light speed, I.e with no real intervening time period, you can achieve it's speed, will we ever do so? yes?? It's only a matter of time

 

[Arctic Fox]

With respect I'm not sure you guys really quite have a feeling for the implications of what Russ is explaining to you when he says this is all hypothetical 'cause nothing could move at the speed of light (at least nothing with mass).

[...] it's a case of something that literally CAN NOT BE DONE, not now, not a thousand years from now, or a million.

Everyone's comments have been very helpful and thanks!

But, we are connecting the FTL 'barrier' to Einstein's theories, yes?

I see the only real reason we're not already going FTL is because of one man, one human... theory. Just because a few things have been ' proven' mathematically doesn't mean it's 100% correct, nor does it mean that Einstein's theories are now Law.

I had someone somewhere tell me that just because my theories could be explained with math equations, didn't mean they were correct - I use that same quote here. There has got to be another way around this, and I think if we stop limiting out thinking to E=mc^2, we'll see another picture.

 

[juju]

Hi Artic Fox,

I agree. Just because a theory (even one well-documented) says that we can't do something, that doesn't mean we can't.

I think that a startrek-like warp field is possible and may be realized sooner than anyone believes.

I would also like to say that it appears weird to me that anyone would want to be stuck forever in the confines of limiting theories. The only real adventure in science is the possibility of the unknown.

As my favorite quote from AE says "Imagination is more important than knowledge."

juju

 

[nightcleaner]

What if space and time could change, so that if you went near a certain object, you might get larger or smaller, or experience a faster or slower rate of time? If saw someone going near this object, you would see them move slower and slower, and maybe get smaller and smaller, until you couldn't watch them any more. You could come back after fifty years, and still see them, a tiny microscopic point, moving very very slowly.

But then if you went near that object yourself, you would not feel like you were slowing down at all, in fact you would not feel any different at all from the way you "normally" feel. Then, if you had a change of heart and turned back again, you would see the world you left speeding up and moving very very fast, until, by the time you returned entirely, hundreds of years might have passed. You would have been away for maybe a year, but when you get back again, hundreds of years have gone by.

Then what if you did not turn back at all, but just kept on going toward the object? Maybe the whole universe we know would get old and die, but you would still be going forward. Maybe new universes would form.

It is true, I think, that we cannot push an eyelash that hard. No onboard engine will ever probably fly a ship to near light speed. But, maybe we don't have to push. Maybe there are places in space where we could just fall all the way to light speed, as if falling toward some huge but immensely far away object. Maybe it would be like falling off a waterfall in a barrel. The barrel doesn't need an engine to push it faster and faster, it just falls.

And then, what if you had an engine like that proposed by the scientist Freeman Dyson. True, your mass would be greater, but so would the mass that you use for fuel. You would not notice that your fuel wasn't giving you the same push as before. Nothing would seem to change for you, except your view of the world you left behind. That would recede into a point, very very hot and very very fast, and you could not go back there again. If you went back to the "same" place, you would arrive there at a very different time from the one you knew when you left. There is really nothing in physics stopping us from exploring the universe. The only problem, aside from the technical ones of life in deep spacetime, is that once you decided to go, you could never return. The price of immortality is eternal exhile.

nc

 

[TheStatutoryApe]

With respect I'm not sure you guys really quite have a feeling for the implications of what Russ is explaining to you when he says this is all hypothetical 'cause nothing could move at the speed of light (at least nothing with mass).

I quite well understand that it's hypothetical and that there is a great problem of reaching that speed which is why I brought up the need to shield the passengers and ship from the effects of the velocity. When Arctic asked the question I wasn't realising that (s)he was referring to the speed of light with "c" but just assumed "c" meant a constant speed undefined.

 

[Louis Cypher]

Good thinking people, outside the envelope,just say yes we can travel faster than light and then go out and proove it 'swhat makes a good doctor of philosophy Thinking outside the envelope, after all if your traveling at the speed of light and some one observes u from outsside holding a lantern how fast is the light traveling anyone got any ideas about the twins paradox?

We can travel faster than light scientists have observed sub atomic particles that appear to move back wards in time to anhialate themselves or did I dream it?

The answers in the post

 

[Curious3141]

I don't understand something. Let's say we have some sort of advanced fusion engine on board the spacecraft .

At a speed of 0.999c relative to the Earth, the spacecraft would appear to have the mass of a "gazillion" Universes or whatever. But the nuclear fuel woud go up in mass by the same factor and the extractable energy would still be related by E = mc^2.

From the rest frame of the ship, the remaining nuclear fuel would only have its rest mass, but the ship would be at rest mass too. As far as the ship itself is concerned, there is no great difficulty in accelerating itself further to 0.9999c, for example.

Is my logic totally off ?

With respect I'm not sure you guys really quite have a feeling for the implications of what Russ is explaining to you when he says this is all hypothetical 'cause nothing could move at the speed of light (at least nothing with mass). Since I didn't either maybe I can help.
Imagine something REALLY tiny and insignificant, like just a single solitary nose hair. You can just blow on something that light and it'll fly off a table top right? In other words it's easy to move at everyday speeds 'cause it doesn't weigh much. A single breath can move it.
Now I'm making these numbers up (Russ could probably provide real numbers), but these fake ones accurately show in general HOW this works.
O.k. As things move faster they get heavier (more accurately more massive or difficult to move but you get the idea).
So now at rest that nose hair weighs practically nothing and a single breath can move it.
But as its speed increases its mass starts to go up LIKE CRAZY.
At a half light speed, that same nose hair now weighs as much, and is as difficult to push, as a railroad car.
(so forget about it moving when you blow on it, you're now going to need something with several THOUSAND horse power to push it any faster)
At three quarters light speed it weighs as much and is as difficult to push as an entire planet.
(At this point there isn't an engine in existence, and none I know of even on the drawing boards, big enough to move it any faster)
At seven eighths light speed it weighs as much and is as difficult to push as an entire GALAXY.
At fifteen sixteenths the speed of light that very same tiny nose hair weighs as much and is as difficult to push as OUR ENTIRE FRIGGING UNIVERSE!
And at thirty one thirty seconds light speed it now weighs as much and would be as difficult to push as a gazillion trillion million universes!
At this point you STILL haven't reached the speed of light yet, you're just close, and even if you could come up with some fantasy "matter/antimatter warp drive engine" powerful enough to push "a gazillion trillion million universes" what in the living HELL would you use to run that engine? ALL the energy in our ENTIRE universe, wouldn't even be the slightest fraction of the amount of energy you'd need to so much as start that puppy let alone get it to idle for a minute or two.
And you have to keep in mind that what we're talking about here is what it would take just to push a tiny little nose hair up to light speed, so try to imagine what it would take to move an entire human being, let alone some kind of ship full of people and equipment up to those impossibe to attain speeds.
So this isn't like "breaking the sound barrier" in that maybe, someday in the future, somebody could come up with an engine powerful enough to drive a "starship" up to the speed of light, because it's not a case of not being sophisticated enough technologically to do it, it's a case of something that literally CAN NOT BE DONE, not now, not a thousand years from now, or a million. What the physics is telling you is that the whole idea of trying to build a "starship" with "matter/anti-matter engines", or whatever, powerful enough to push it to light speed (let alone faster), is simply a dead end approach no matter how much time you spend on it, so if you want to get to other stars in less than a single lifetime, you're going to have to come up with some other way of doing it other than pushing a ship with any kind of powerful star drive engine.

So when Russ says this is all "hypothetical" he means way waaaaay beyond practical, and well into the zone of talking about the aerodynamic load requirements of a pixie's wings in a discussion about how to use pixies to air lift cement trucks into the jungles of the Congo.

When you ask "what happens when you travel at the speed of light", you're actually asking a nonsensical question about "what happens to something when it gets bigger than infinitely big?". There's no such thing as "BIGGER than infinitely big". The question doesn't really make sense. So when you try to calculate what happens the answers don't make any more sense than the question does, which is why you get answers like...
Time stops from your perspective.
You become thinner than having no thickness at all in the direction of travel.
And your mass approaches infinity.

Zat help at all?

 

[freep2]

what about light going in a curved or spiraling path? Would not that be faster than a straight line? Therei is no matter in the universe, only energy. Light=Energy.

 

[juju]

I don't understand something. Let's say we have some sort of advanced fusion engine on board the spacecraft .

At a speed of 0.999c relative to the Earth, the spacecraft would appear to have the mass of a "gazillion" Universes or whatever. But the nuclear fuel woud go up in mass by the same factor and the extractable energy would still be related by E = mc^2.

From the rest frame of the ship, the remaining nuclear fuel would only have its rest mass, but the ship would be at rest mass too. As far as the ship itself is concerned, there is no great difficulty in accelerating itself further to 0.9999c, for example.

Is my logic totally off ?

The same thing happens at the event horizon of a black hole. The far away observer never sees the local observer pass through the event horizon, while the local observer passes easily through the event horizon.

In your example, the ship could possibly accelerate as long as it's fuel lasted even beyond the speed of light, relative to some absolute spatial reference frame. However, the observer at rest would never see the spaceship break the light barrier. However, time dilation due to relative observed velocity, would account for the increased velocity of the spaceship.

juju

 

[Huckleberry]

How long would it seem to be for the travellers? General consensus seems to be that the travellers would experience no passage of time on their ten year journey at the speed of light. This makes sense to me and here's why.

Imagine if this traveller has a telescope with them on this journey that is powerful enough to view the Earth in detail from 10 light years distance. If they are moving at the speed of light and looking back at Earth as they do so they would see no change. They would be moving along at the same speed as the light that as being reflected from the Earth. They would perceive no movement from the time that they began to move at the speed of light. When they come to a speed relative to that of the Earth then they would move through time at the same speed. It would all seem instantaneous to the traveller who would be able to look back at the smoke on the launch pad, so to speak. However, the light that the traveller is viewing has been traveling for 10 years along with him and back on Earth everyone is ten years in the travellers future. The actions that people take on Earth today, the traveller will see in 10 years time. It makes sense to me that the laws of the universe would balance the experience of the consciousness with that of the senses.

When we watch a sunset, in reality the sun has already set about seven minutes ago, the time it takes for light from the sun to reach the Earth. When we look at the stars at the edge of our galaxy we are actually seeing those stars as they were billions of years ago. Yet if you were to throw a baseball at the image of a star 10 billion light years away it would eventually strike that star even though its actual location could be on the other side of the galaxy.

As far as things moving at and beyond the speed of light, most people seem to believe that it is not possible within reality. It is a scientific view we can only make judgements based on what our senses can tell us. If an event cannot be observed and measured then how can we make a rational decision? Anything moving faster or slower than the speed of light in relation to the observer would take on different dimensional properties. How can you measure velocity if there is no time? How can you measure change in scale when both the observer and the object change at the same rate? It doesn't make sense from a mathematical point of view. Despite this I still mantain that the velocity of light is exactly the velocity of the observer, but matter and energy can only exist in the contemporary 3D if their velocities are within +/- the velocity of light in relation to the observer.

What was the question?
Huck

 

[Boanerges]

The reason why Einstein faced consternation in all of his attempts at deriving at a "Unified Field Theory" is that he omitted the influence (Electromagnetic, Kinetic and otherwise) of the power of the human mind and the forces of one's will against an object...

 

[juju]

Huckleberry,

What if you pointed the telescope at your destination.

juju

 

[jdlech]

Curious3141, I once wrote a college paper on the very idea of using a nuclear fuel. Unfortunately, it doesn't work that way.
Imagine you're on a nuclear powered space ship. Your fuel is accelerating as much as you are. You will never see it's mass increase. So your acceleration is perfectly linear. But as you watch out the window, you will notice a peculear phenomena, the rest of the universe is moving faster and faster while space in front of you seem to be pancaking. As you approach C, the entire depth of the universe should flatten out to just a few feet. You will traverse the entire universe very quickly.

Those watching you will see your ship accelerate. It's entire mass will increase as you approach C, but by quirk of physics, the energy required to accelerate your increasing mass also increases. Your acceleration remains linear. Except for the second quirk of physics - time dilation.

Because you are approaching C, outside observers see you as having an ever decreasing acceleration. In other words, to everyone else, you will never reach C. If they were to see inside your ship, they would notice you moving slower and slower. Next thing they know, you're traveling thousands of light years (taking thousands of light years to do it too) in the length of time from one of your heartbeats to the next.

Simply put, the person doing the traveling is exchanging space for time and the person watching will see him exchanging time for space.

For the traveller at C, space becomes 0 (or a single point) while time becomes infinite.
For the observer, at C, time becomes 0 (or a single point) while space remains infinite.

what confuses me is that if this is true, then how do photons in a vacuum decay? In the classical sense, a photon should never decay.
But they do.

I'm starting to remember some strange work I did years ago. It losely related space and time to the sine and cos function. I went from incessantly flipping a pencil toards me and watching it's length go from 1 (pencil length) to 0 (a single point) and then imagining our observation of space and time doing the same thing via mass and velocity. After filling an entire notebook with geometric and trigonometric gobbledygook, I ended up with the statement that mass(M) at velocity(C) is equivalent to a fixed time reference(0, or a single point).

An entire notebook filled with some mathematical babbling, I guess.

 

[Arctic Fox]

An entire notebook filled with some mathematical babbling, I guess.

I'll give you US$100 for that notebook...

 

[Huckleberry]

Huckleberry,

What if you pointed the telescope at your destination.

juju

Then the relative speed of the traveller compared to the light from the destination would be greater than the speed of light. The traveller might be surprised to find their destination 10 years distant from where they expected it.

 

[jdlech]

Give me an addy, Fox. I doubt it's worth anything, but I'll share it.

 

[Arctic Fox]

Sending you a PM...

 

[x8jason8x]

Hi Artic Fox,

I agree. Just because a theory (even one well-documented) says that we can't do something, that doesn't mean we can't.

I think that a startrek-like warp field is possible and may be realized sooner than anyone believes.

I would also like to say that it appears weird to me that anyone would want to be stuck forever in the confines of limiting theories. The only real adventure in science is the possibility of the unknown.

As my favorite quote from AE says "Imagination is more important than knowledge."

juju

This is absolutely true. If no one ever challenged dogmatic thinking, nothing would ever change

 

[KKHausman]

FTL Transit

When discussing the potential for FTL travel, it would seem that at least two approaches exist that do not require violating the established mathematical genius of so many before us:

1) Simultaneous events do not violate any type of 'speed limit'. The resolution between physically separated quantum-entangled particles does not violate a speed limit because it simply occurs without a propagative duration. Finding a mechanism to exploit this capability on something larger (say, the proposed starship) could allow a change in spatial location without violating relativistic parameters brought about by high rates of speed.

2) Metric distortion of a significant enough gradient has been calculated to create a temporal modification between the contained volume and that without - the most extreme version of this expressed as the "event horizon" of a singularity. Should we create a mechanism capable of creating a distortion of the metric around the same object as before, it might be possible to make use of this as a form of spatial-transit amplifier. If the curvature were, for example, to result in a partial decoupling that yielded a 1:10 ratio (just a number out of a hat for discussion purposes alone), then the same starship-object traveling at just over 1/10th C might be able to measure a translated spatial position change greater than that available to the lowly photon traveling a similar path.

I am certain that there are many other possible solutions, and offer these only for the purposes of discussion that there may be alternatives that do not need to violate the measured laws as we know them.

K Hausman

 

[selfAdjoint]

When discussing the potential for FTL travel, it would seem that at least two approaches exist that do not require violating the established mathematical genius of so many before us:

1) Simultaneous events do not violate any type of 'speed limit'. The resolution between physically separated quantum-entangled particles does not violate a speed limit because it simply occurs without a propagative duration. Finding a mechanism to exploit this capability on something larger (say, the proposed starship) could allow a change in spatial location without violating relativistic parameters brought about by high rates of speed.

Assuming relativity is basically true, as quantum physicists do, we know that simultenaity between spacelike separated observers is not well-defined. They will disagree on what is simulaneous and even on which order the supposed simultaneous events occurred. This is one of the reasons that quantum entanglement does NOT produce instantaneous or FTL causes.

2) Metric distortion of a significant enough gradient has been calculated to create a temporal modification between the contained volume and that without - the most extreme version of this expressed as the "event horizon" of a singularity. Should we create a mechanism capable of creating a distortion of the metric around the same object as before, it might be possible to make use of this as a form of spatial-transit amplifier. If the curvature were, for example, to result in a partial decoupling that yielded a 1:10 ratio (just a number out of a hat for discussion purposes alone), then the same starship-object traveling at just over 1/10th C might be able to measure a translated spatial position change greater than that available to the lowly photon traveling a similar path.

There is the Alcubierre and related "space warp" metrics in GR. They all require generating negative energy.

I am certain that there are many other possible solutions, and offer these only for the purposes of discussion that there may be alternatives that do not need to violate the measured laws as we know them.

Again, accepting relativity implies that FTL travel entails time travel and requires that negative energy. Good luck!

 

[dragons ascent]

Taking into consideration that time (as an entity) from this planet invariably could not match with any other planets' constructs; could we ever safely align this time for comparison of progression or regression? This may seem very confusing within the structures of what we deem as right opposing what is natural (So, we sit and ponder only because action hasn't been taken to interpret the actual statistical facts of the study of time/space travel.) Einstein knew and professed time/space could be grided by using topographical mapping skills which using the artistic interpretation of the user would unmistakably (by chances alone) never be matched with an infinite possibility (because we know of one absolute to be true: change is apparently and constantly present with all time). All that aside, if we can assume that there is one phase of time which is constant throughout all time then the procession of time would remain constant. In other words, we would never find a deterioration of time. Following this assumption, the impact that time has on mass, either aggressively or passively but never retrogressively, should also remain constant. I am not certain that I can finish there but if you understood anything I just posted then you just may be smarter than i.

 

[Rayham]

sry, I didnt read the whole post, I just had to make a comment about this:

"With respect I'm not sure you guys really quite have a feeling for the implications of what Russ is explaining to you when he says this is all hypothetical 'cause nothing could move at the speed of light (at least nothing with mass). "

didn't we learn a few years ago that light has mass?

 

[tino lin]

From these discussions, it seem a lot of people accept the idea that time slow down at high velocity. I can't seem to fully accept this fact cause the only proof so far is a delay in the measurement instrument like a machanical clock or light clock with two reflecting mirror, for example. When the measurement instrument is moving at high velocity the error, I think, come from the fact that the measurement instrument is made of moving part. It is time really being delay or the measurement instrument is affected at high velocity? Is there any experiment that prove time is being delay in a biological clock like the twin paradox, unfortunately this kind of experiment is not feasible yet.
If time is really being delay, then a photon that alway travel at C should not age. Does a photon have any decaying property while traveling purely at the speed of light??

 

[wolram]

The thing i find strange is where this relative mass comes from, does the
higgs field monitor particle speed? or do gravitons detect a law breaker and
latch on to halt illegal speed?

 

[Phobos]

Lots of past debates about relativistic mass in PF's Relativity forum. Perhaps rather than thinking of it as actual mass being added, think of it as (1) the change in behavior of matter interaction with spacetime...increased inertia? and (2) which is what an outside observer would measure as increased mass.

 

[George]

Special Relativity is wrong.

Bart Simpson leaves Earth on a skateboard at lightspeed - 670 M MPH, c. He takes with him a wristwatch synchronized on Earth time, (but the synchronisation is largely irrelevant), and 26 cards, each with a letter of the alphabet on them, from A-Z.

He holds up the letter "A" as he leaves Earth. At one minute elapsed time, on his watch, he holds up the letter "B" instead. As he does this, his actions, and the appearance of letter "B", seem to him to happen every bit as quickly as they would on Earth. He sees "B" just about immediately. But on Earth, before we see the letter "B", it takes 1 more minute - the time it takes for light to travel to Earth from Bart.

He continues to hold up a new letter each minute on his watch, so after 26 minutes in his time, he is holding up the letter "Z". But on Earth, we have to wait 26 minutes for the image of "Z" to reach us. For Earthlings, seeing the whole alphabet would have taken 26+25+24+23+22+21+20+ ... +1 minute, (351 minutes), but for Bart, the whole thing took only 26 minutes.

Of course, this assumes that Bart has taken his own local light source with him to illuminate the proceedings. If not, then you can add to the time it would take to see the alphabet from Earth with the time it would take for light to shine from its source (say the Sun) to reach and reflect from Bart.

If Bart took his own light source, and used it to illuminate the righthand side of his body only for example, while the Sun illuminated the lefthand side, and, in between changing his alphabet cards, he clapped his hands, then you would see Bart's right hand making (approximately) twice as many clapping actions as his left hand! This alone drives a coach and horses through Special Relativity, which seems to have escaped simple scrutiny for over 100 years.

As a footnote : "Time" is not warped, dilated, stretched, shortened nor anything else. Since nothing can travel faster than light or EM waves, no physical or other process can progress in less than one photonic wave period. No synapse can exchange chemicals, no atomic particle physcially move position, fission or fuse, no politician be elected, no bird sing, no chemical reaction take place, in less than one photonic emission cycle. This *guarantees* that light captures every physical change observable at the photonic interface of any object.

 

[meaticus]

Special Relativity is wrong.

Bart Simpson leaves Earth on a skateboard at lightspeed - 670 M MPH, c. He takes with him a wristwatch synchronized on Earth time, (but the synchronisation is largely irrelevant), and 26 cards, each with a letter of the alphabet on them, from A-Z.

He holds up the letter "A" as he leaves Earth. At one minute elapsed time, on his watch, he holds up the letter "B" instead. As he does this, his actions, and the appearance of letter "B", seem to him to happen every bit as quickly as they would on Earth. He sees "B" just about immediately. But on Earth, before we see the letter "B", it takes 1 more minute - the time it takes for light to travel to Earth from Bart.

He continues to hold up a new letter each minute on his watch, so after 26 minutes in his time, he is holding up the letter "Z". But on Earth, we have to wait 26 minutes for the image of "Z" to reach us. For Earthlings, seeing the whole alphabet would have taken 26+25+24+23+22+21+20+ ... +1 minute, (351 minutes), but for Bart, the whole thing took only 26 minutes.

Now Bart, remembering that Homer's bringing pizza home for dinner, turns arround and heads back, repeating the aphabet thing, and hoping he makes it back before Homer eats all the pizza. The same times will apply as he returns - 26 more minutes for him, 351 more minutes for Lisa (and Homer, who got tired of waiting and went to eat some pizza).
When he gets back, his watch says that 52 minutes have elapsed, and Lisa's has advanvanced 702 minutes. Bart is 52 minutes older, the Earth is 702 minutes older.
And the pizza is gone.

 

[tino lin]

As a footnote : "Time" is not warped, dilated, stretched, shortened nor anything else. Since nothing can travel faster than light or EM waves, no physical or other process can progress in less than one photonic wave period. No synapse can exchange chemicals, no atomic particle physcially move position, fission or fuse, no politician be elected, no bird sing, no chemical reaction take place, in less than one photonic emission cycle. This *guarantees* that light captures every physical change observable at the photonic interface of any object.

If this universe is created or simulated it seem like the cpu cycle is
f = c/wavelength of photon. And the tick of time would be 1/f.

 

[George]

The cumulation I proposed is wrong actually. The alphabet gets seen on Earth and by Bart both in 26 minutes. When he returns home, 52 minutes elapsed on all clocks, and he gets the pizza.

 

[Arctic Fox]

So, time doesn't matter...

 

[George]

I am personally not sure about what you mean by time not mattering. I think that time passes at the same rate wherever you are and whatever you are doing, or whatever speed you are traveling at. It only looks like events speed up or slow down as light receded or advances from the source. The passage of Time, and how "quickly" events appear to happen are not related.

 

[CaptainQuaser]

Know the future

A quick question that I was wondering. If the brain works sort of like a computer, in that it stores information by creating neural links. Then theoretically speaking if we were able to go into the future and come back we would be able, from a biological point of view, be able to know what happened. The future events would rewire our synapses and we would physically know the future. Well, is it possible for those same synapses to be accidentally linked without any actual experience of the future, it would then be physically possible to know the future. However, as it is irrelevant to the situation and our brains logic circuits would filter any accidental knowledge from reaching our conscious mind. This could potentially happen all the time, but then perhaps a future event fires all the exact same synapses triggering a familiar feeling, (Deja veux). Now, what if in a small segment of the population this foreknowledge was not properly filtered. Would it then, from a physical point of view be possible to know the future?

Just wondering, I may be way off base, I’m a physicist not a neuro-scientist, but your input on this thought would be appreciated.

 

[selfAdjoint]

A quick question that I was wondering. If the brain works sort of like a computer, in that it stores information by creating neural links. Then theoretically speaking if we were able to go into the future and come back we would be able, from a biological point of view, be able to know what happened. The future events would rewire our synapses and we would physically know the future. Well, is it possible for those same synapses to be accidentally linked without any actual experience of the future, it would then be physically possible to know the future. However, as it is irrelevant to the situation and our brains logic circuits would filter any accidental knowledge from reaching our conscious mind. This could potentially happen all the time, but then perhaps a future event fires all the exact same synapses triggering a familiar feeling, (Deja veux). Now, what if in a small segment of the population this foreknowledge was not properly filtered. Would it then, from a physical point of view be possible to know the future?

Just wondering, I may be way off base, I’m a physicist not a neuro-scientist, but your input on this thought would be appreciated.

Yes, this is a common idea. But as a physicist you must know there is no known mechanism by which the acausal modification of our synapses by future information could take place. Neurologists have plausible if not completely rigorous explanations of deja vu.