Okay, so then moving to either side through light and dark areas looking back at the slit we see it as lit or not depending on our position in the projection screen?
Can we see the space between the slits or does it just appear as one slit?
Some questions have been haunting me about this experiment for some time. I'm mainly interested in what we observe from the perspective of the projection screen.
First let's imagine that there is only one slit, and we are observing from the projection screen looking back at the slit with the...
The parasites "Hexamita" are thought to always be present in the intestines. When fish are under stress, or their diet contains hard to digest proteins, the parasites can multiply create blockages, and puncture the intestine linings. They can then enter the blood stream and internal organs...
I'm basically concerned with african cichlids, and more specifically those from lake malawi. This question stems from a debate on the Cichlid-Forum. It is widely recommended there and other places that specialize in these cichlids that adding epsom salt to the aquarium water will help flush...
I'm interested in understanding this process (Osmoregulation) better. There is some debate about treating freshwater fish by adding medication to the water, and for some instances adding epsom salt.
I have read that osmoregulation in fish only allows water to pass through the skin, and not...
My understanding is elementary at best, but I think analogies relating to the size of the universe at any point in time can only refer to the observable universe of a location. Two marbles may be only be separated by a small distance, but each marble's center has its own observable universe...
Part of it is the fact that a mirror reflection is flipped compared to a picture. Hold up your right hand in a mirror and in a picture, in the mirror it looks as if your left hand is up.
I'm no expert certainly, but it's my understanding that an accelerating light clock will not count seconds properly in its own frame. The photons will travel at an angle away from the direction of acceleration causing the photon to either miss the reflector (if the reflector was small enough) or...
While I understand part of your point, your explanation is flawed. Using the example of the target being one light year away, if the laser starts to rotate yes it will take one year to notice this on the receiving end. At that point though the spot will start to appear to move faster than the...
What happens to light when it hits an oxygen atom? Does it just go right through as if the oxygen atom isn't even there, with no interaction at all?
Is there no chance that the light is absorbed by the atom, then is emmited as a wavelength outside the visible spectrum?
If the second question...
This argument falls into line with the comment I made about turning my head away from the paper. It was dismissed quickly, and rightfully so. If an object is truly black you can't see it even when the lights are on...
Why do you keep asking the same question, I already answered it. You want to talk about 0 kelvin, fine. Something that absorbs all visible light obviously doesn't reflect any... Something at 0 kelvin obviously doesn't emit any light... Do you still need to know where I got the definition of...
It's not a definition, I'm simply relating conditions of matter that fit it into the definition of black. If you have something else to offer I'm all ears.
If someone here doesn't agree that by definition oxygen, and other colorless gases fit into the definition of black, then I would like an...
In the scientific definition of black you are right, but we as everyday people call things by the color black (a car for instance). Now scientifically you would argue with me that what I call a black car is not black, and you would be right, but I'll continue to refer to it's color as black...
Show me any piece of black paper I can't see, with a light shining on it and I'll agree with you...
I would consider some gasses black (like oxygen), but I don't know of any solid objects that can be considered black by your definition. So it's doubtful that a piece of paper can be perfectly...
What? Theres no way to keep the water from flowing into the "Air tube". I see you drew a line seperating the air from the water at the bottom, but that's hardly a solution.
I have no idea what you are trying to show with this image, and I don't understand how it relates to the topic. What the camera captures is irrelivant, we still use out eyes to interpet the image. Have you looked at the pictures in the link I posted? Clearly in the third image one square looks...
The light is no more yellow that the light hitting the paper outside of the Blue light, yet we wouldn't precieve that paper outside of the blue light to be yellow as the shadow is. They are infact the same color we just interpet them differently.
It has to do with the way we interpet colors when they are close to other colors. In the example the OP uses he is not blocking ambiant light, he is blocking a source of concentrated blue light. This would mean that the ambiant light is still hitting the shadowed area as it would normally.
It...
It's an optical illusion, and has to do with the way we preceive colors and shadows. There is an excellent example of this somewhere on the web, and I'll try to find it now.
Found it, this one is just amazing, I'm sure you will agree...
Only air spaces in the body will expand in this situation. The body is mostly water and solids which are for the most part not compressable, and don't expand. Attempting to hold your breath is what causes over expansion injuries. If you don't hold your breath the air will escape through your...
Yes holding your breath could result in a number of different over expansion injurys. Read Evo's post in the link Russ provided, it sums it up pretty well.
The blood won't boil because of the pressure exerted by the rest of the body. Then only reason the saliva would boil is because it is...
If we are talking about blood contained in the body it will not start to boil in a vacuum. The body itself creates enough pressure on the blood to prevent that. There was an article I read where an astronaut training in a near vacuum chamber had some kind of malfunction in his suit, and was...
Head shakes are common on a lot of street bikes, and even dirt bikes. Steep stearing angles combined with small trail numbers make the problem more prevelant. I have has voilent head shakes before at over 100mph that caused the front wheel to wobble back and forth hitting the stearing lock on...
This is hardly worthy of the debunking forum IMO. What is there to debunk? Theres no evidence other than someone saying he saw something shiny in the sky. Seems more like a topic that belongs in general chat. I think the fact he remarks "We even had time to take our field glasses" but not enough...
Someone must have started the site as a joke, and people being the sheep that they are, some of them just migrated into the pack.
The FAQ is quite humorous, claiming there is a giant ice wall, and that airline pilots are part of the conspiracy to help keep the secret.
Thanks for posting...
I think this is how they did that super glue commercial where the guy is hanging from an I beam. His hard hat had a milled pice of metal joined to another that was attached to the beam.
This is interesting to me. Can you calculate the radiation pressure on the Earth from all other directions. I'm interested in knowing if the pressures at all other points on the earth, not directly in line with the sun, are greater or lesser than the radiation pressure from the sun.
Seems like...
I'm still not posative the OP wants a light saber, as he hasn't replied, but I had an idea for making something similar. Using a compressed gas cylinder to inflate a semi-ridgid clear balloon in the shape of a saber blade, and choosing a gas that has a high reflective index (not sure what that...
I think it has more to do with the binding force holding the molecules together. The sidewalk doesn't pass through our bodies because of the electrons repulsion, but if the sidewalk was made of water this repulsion would not stop a person from being pulled through the same way the air doesn't...
The question I would like to ask (once again as I don't think it has been answered yet) is concerning a situation where one twin remains on earth, and the other leaves the Earth at a high rate of speed, then returns.
In this situation it is my understanding that the twin that made the...
Top speed will probably be highest with larger wheels, while acceleration would be higher with smaller wheels. A lot depends on the distance of the race I would guess.
As long as the top of the water column of the output end is below the top of the water column of the supply end it will continue to flow.
As for the "why" a siphon works because gravity acts on the water in the siphon creating an area of low pressure at one end of the siphon. If a siphon is...
Thanks for correcting this. I was wondering why no one else was helping in this thread, as it seemed to be contrary to everything I have learned here. I still have issues with the statement that one never sees the other's watch as running faster, and I'm pretty sure in the past I have read a...
This is totally different than what I understood about time dilation so bare with me. The most common watch type today has quartz movement if I'm not mistaken. So let's say a quartz crystal occilates at rate R. Now human cell division (for lack of a better example) also happens at a determined...
Maybe this makes sense and I am just too thick to understand. If Observer A (the one that leaves the Earth and returns) shows 10 years passed. And observer b shows that 20 years have passed (and both observers can see each others watch the whole time). How is it that when they are reunited (and...
Ok, I surely don't understand time dilation very well at all, but how can this statement be justified. In the twins paradox the twin that accelerates away from the other, then returns to find more time has passed for the twin that didn't travel. Surely at some point along the journey the...
Doesn't rotation speed depend on the observer? I can't imagine a situation where any object will appear not to rotate to every possible observer. That would be assuming some kind of preferred frame of reference which doesn't exist.
What is it not rotating compared to? Seems this is like...
I have a different view than most here it seems. As the stream falls the leading edge (the bottom) experiences air resistance which causes it to mushroom (for lack of a better term). Like raindrops resemble little parachuttes, not actual drops we like to think of. This actually causes a slowing...
Another point I see is that, as the stream breaks into droplets, these droplets pull together to form a roughly spherical shape that is wider in it's cross section that the stream. This means that water from the stream contracts in two directions to some extent. These directions would be in the...
I disagree, consider what happens to your car winshield when it's raining. At a stop if the rain is moderate you can still see, at least more clearly then when moving foward at speed.
Same thing happens to a person. Moving foward at increased speed increases the amount of raindrops that hit...
The radio transmitter would be uneffected no matter how many people tuned into the broadcats. The arrangement of the receiving radios could block other radios, who were close enough to receive the signal, from receiving the signal though. Just as the 10,000 heads/bodies vieweing a candle could...