Nice new skin.
I’m very new to this board so I’ve only been looking at the old skin for a few weeks.
I like this new skin much better. (just personal preference.)
It has a hi-tech edge look to me. Nice work and Good luck with it.
It loads fast. I think faster than the old skin.
The...
Looks like I was mixing up apples and oranges.
Thanks for the clarification. :biggrin:
Your example above makes it clear. I think remembering the standard embankment and the train example is the best way to remember the concept of simultanaety. It works well.
best,
Eon.
Thanks for your thoughts Simon.
OK.
I don't understand what you mean by this.
I think you are right.
Einstein says the following about time.
To me, The above is 100 percent correct.
I was kind of trying to determine if there is a type of relativity of simultaneity that depends on just...
Question:
Let’s say one observes three events on Earth while looking up at the night sky. One being right next to an observer on Earth (a flash light turning on), a second being on the moon (a large flash of light of some sort), and a third on Proxima Centauri, (perhaps a massive solar flare...
I think the question "Is time real" is more a philosophical question, but a very fair and interesting one to ask in philosophy.
What IS a scientific issue that has been answered clearly is to know that any statement about the time of an event in the universe has absolutely no meaning...
Good points
JesseM and Severian596,
You guys work through this stuff really well.
Thank you for all the helpful replies.
It's all very very interesting.
Till later,
best,
Eon.
Yes this makes sense. Brilliantly put. Thank you. I believe I get it.
Now onwards below.
It's the bolded part just seems so strange. A paradox.
Because after the journey we don't have to think of frames anymore. We can communicate over these distances normally and easily establish positions...
So well put. Agreed.
EDIT: Forget what we see for a moment. Let's presume the 10 second .99c journey is over. And now A,B and the ME in the middle communicate with each other. (time dilation and length contraction are now pretty much zero. We've stopped)
Two further questions.
1) Is it...
No worries and no need to apologize.
I didn't see any issue with your description.
Honestly, the way you described Riemann normal co-ordinates was
close enough for a non-expert like myself, that your description appeared to work for the gaussian coordinates.
You didn't mention right angles...
That makes sense. Thanks.
I'm reading "Albert Einstein's Relativity: The Special and General Theory"
So according to the link below, the bullet's trajectory is like the "U" curve. Each "tic marc" is a part of the "V" curve and the intersections are P1, P2, Pn...etc.
Here's a link to the small...
I found the short answer may be that gaussian coordinates are just Cartesian coordinates wrapped over a curvature.
or
a Gaussian coordinate system is just a curved Cartesian coordinate system
Hello, :)
The below link has great examples and simple explanations of
4D space-time light cone diagrams and how they are used in Special Relativity.
http://www.phy.syr.edu/courses/modules/LIGHTCONE/LightClock/default.html
The university site above was very helpful for visualising how...
Still a good way of putting it.
Just my opinion.
Where as this may be very true.
This was very understandable and very well put.
Perhaps there is a time (excuse the pun) for talking about things using words and concepts regardless of the possibility of confusion, and a time for just doing...
Well said my_wan. Cool.
I should have googled it first.
When I did articles and papers from universities and arXiv.org
came up on the subject of Q.M and S.R and the peaceful co-existence between the two for the most part, but not always.
But as you say for the most part there is no issue. I...
Just a thought.
Is there a tension between the non-locality of Q.M and the private nature of inertial frames and world lines in S.R?
In other words. Let’s say the twins make their flight and return.
But the trip is done in a double blind way where the twins don’t know their flight path nor...