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Speed of light+doplar effect?
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From what I understand about the sonic booms is that the waves pile up because they are created in the same place as the wave that was created just before is when it is created, thus magnifying it to make it into a boom I recently started to woncer if the same things would happen if a solid object like a space ship reached the speed of light, would the light pile up in the same way creating a huge wave of incrdibly intense light |
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Re: Speed of light+doplar effect?
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| Don't think so as light doesnt travel the same way as sound, sound reuires matter to travel and light doesnt. The sound waves are created, but light is simply reflected off an object. Traveling faster than the speed of light, the light produced would be left behind. Now if the light source was traveling at the speed of light, perhaps the rays of light traveling in the same direction would build up some, but eventually the ones first formed would diffuse too much I'd assume. |
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Re: Speed of light+doplar effect?
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| sound also diffuses though but we still get sonic booms, and light travels in the same way, as waves, different colours the closer the waves are and more in tense the stronger the waves, but if they where created or bounced at the same time so that they pile up (dopler effect) |
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Re: Speed of light+doplar effect?
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If you are talking about light moving through space you can't apply the Doppler effect because of the constant expansion of space. And light travelling faster than the normal speed of light is only possible due to expansions in space and would not be "left behind." It would simply be of a different wavelegnth because of the cosmological redshift. And no they would not pile up like in the doppler effect, which should not be apllied to light since it doesn't take into account general relativity.
Tirez-moi. Je vous ose.
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Re: Speed of light+doplar effect?
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| Alright, well thank you |
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Re: Speed of light+doplar effect?
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| I just realized something, if the waves stared to get closer together (ie red shift, blue shift, blah, blah) they would leave the visible wavelengths and enter into radio waves, microwaves, x-rays, etc, but they would still pile up if you where to travel at the right speed, even in space, we see this can happen because of objects that are moving away from us are red shifted, going just below the speed of light would cause it to leave the visible wavelengths in either direction, and if it was towards you it would shift into ultraviolet, then xrays, then gamma rays, and then it would move past that and who knows what would happen, it would have to have incredible energy though |
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Re: Speed of light+doplar effect?
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| well, there's this well, hypothesis that if you travel faster than the speed of light, you actually travel in time... therefore, if you travel just above the speed of light, you can actually travel anywhere without spending any time (infinite speed) therefore,there wouldn't be a piling up of frequencies at one end... another I can think of is that well, after the light pass through whichever medium is has to go through ie glass, it reverts back to its original speed, therefore, there wouldn't be the doppler effect |
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Re: Speed of light+doplar effect?
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| Fortunately, relative clears all this up. Since it is impossible for anything other than light to travel the speed of light, the paradox of traveling the speed of light and turning on their head lights on is avoided. But, even if you are travelling .99 times the speed of light, the light emitted from your headlights will still travel away from your vessel at the speed of light. Convientently enough, any observer at "rest" will also clock your lights at the speed of light, regardless of your speed, but will notice that the clock on your wall doesn't seem to be moving. Relativity is grand ;) |
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Re: Speed of light+doplar effect?
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Sonic booms are created by and object exceeding the speed of sound in the medium it is travelling through. Unless we find some new understanding of physics, we'll prolly never see something like an "optic boom" from a spaceship (also the ship would have to be radiating light in all directions as well for it to work) since travelling at the speed of light would require and infinite amount of energy. However, "optic booms"(any better word for this?) have occured and can be measured. The phenomenon is called Cherenkov radiation. Experiments to detect neutrinos rely on this phenomenon. The speed of light through a vacuum is the absolute speed limit, however, the speed of light through other mediums is a bit slower. So, if you smack something like and electron fast enough that it exceeds the speed of light in that medium, you'll get a light cone, an "optic boom." I'm a lil rusty, but I think for neutrino detection, a huge tank of water is used, usually underground. Neutrinos, which will rarely interact with anything, and are prolly passing through you as you read this, will occasionally hit a water molecule and smack off, I think an electron. Since they are moving faster than light through water, you'll get an optic boom. Since this interaction doesn't happen all that often, you'll need a lot of water to get enough data in a reasonable time frame. Cool stuff at any rate. Now I better stop typing and get some sleep. |
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Re: Speed of light+doplar effect?
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| what is up with all these crazy theories. There is no way any object or anything else other than light that can reach the speed of light because it would require infinit amount of energy to maintain such a high volocity. Its just not possible right now because we haven't figure out anything that can generate such a high amount of energy and maintain it. |
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Re: Speed of light+doplar effect?
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by Aoi Azzura
on 2005-05-21 10:56:47 (edited 2005-05-21 11:02:13)
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Agree! The only way to reach the speed of light is to be light itself. 
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Re: Speed of light+doplar effect?
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Since Neutrinos are so small (mass is on the scale of 10^-40, or a billion times smaller than an electron), and so fast, they usually pass right through the GIANT gaps in things. In between molecules, there is mostly empty space. In between atoms, there is mostly space. In between the nucleus and the electrons, there is mostly space. In between the composite particles of protons and neutrons (quarks?), there is mostly space. Thus you are mostly space, and the odds of a neutreno (even the astronomical number that have passed through you as you read this sentence... like trillions or more) hitting anything are unlikely. "but I think for neutrino detection, a huge tank of water is used, usually underground. Neutrinos, which will rarely interact with anything, and are prolly passing through you as you read this, will occasionally hit a water molecule and smack off, I think an electron. Since they are moving faster than light through water, you'll get an optic boom. Since this interaction doesn't happen all that often, you'll need a lot of water to get enough data in a reasonable time frame" Yes. Neutrenos travel through just about anything. Most go right through the Earth without hitting anything. However, a special type of water, Heavy Water (which uses Hydrogen with an extra neutron, Dutonium I think it's called, to form the water) that is OCCASIONALLY hit. Out of gazillions of neutrons, one or two hit. These hits blast the molecule of H2O and it lights up. They pretty much just watch for the light spots to see the collisions. And yes, the dopler effect applies to light. It creates a phase shift (Blueshift, Redshift, Half-Life, Gordon Freeman.. heh... sry) and the frequency changes.
Despair From Darkness
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Re: Speed of light+doplar effect?
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| Some one said in thies forum that nothing but the light because to reach tha speed we would need a huge amount of energy, but in there are rumors that say according to Einstein`s theory a small coin (1 dollar size) would have enough energy to move a huge ship across the sea and if that is true, we just need how to do that. |