2007-11-23 02:58:12 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Why should it?
Even sound speed does not depend on the source speed, just on the speed of the material medium where sound propagates.
Light speed depends on the speed of the medium, if any, but light speed in vacuum is an invariant.
Energy of photons, or wavelenght of light does depend on the movement of the source.
2007-11-23 03:10:29 · answer #1 · answered by GusBsAs 6 · 1⤊ 0⤋
Because it doesn't. This was a big mystery at the end of the 19th century because it contradicts common sense. The Michelson-Morley experiment proved that the speed of light was always constant (within quantum uncertainty, as it turned out later) and the assumed medium (the ether) through which light traveled became unnecessary.
That light must always travel at one speed no matter how its source - or any observer - is moving is the astounding fact which led directly to relativity and all its consequences both good and bad.
2007-11-23 11:16:22 · answer #2 · answered by hznfrst 6 · 0⤊ 0⤋
wave speed does not depends on source's speed but depends on the speed of the medium
further speed of light in vacuum is constant
speed of source just alters light frequency,by doppler's effect
2007-11-27 07:36:20 · answer #3 · answered by wasif 2 · 0⤊ 0⤋
Because the speed is not decided or influenced or the cause of or the reason of or depended upon the characteristics {proprieties }of the source .
It is entirely dependent or decided by the medium in which it travels.
2007-11-24 10:49:50 · answer #4 · answered by Pearlsawme 7 · 0⤊ 1⤋
Difficult question to answer with or without the use of relativity. I could just say it is like that because Einstein said it is and it is a consequence of nature...which is true..lol. Here is my take on this question. If you had a clock moving past you at a very high speed the seconds would appear to be ticking slower than usual . This of course is proven to happen and is describe by the formula for calculating time dilation. The faster the clock moves the slower the ticks become. Remember it is already proven to happen...you get faster and the ticks get slower....now for arguments sake the clock is moving at the speed of light (I know this wont happen... just imagine the clock is the photon) . Judging by the time dilation equation you will have zero in your denominator which is mathimatically undefined. But in my crude attempt to be physical im gonna say that it would take an infinite amount of time for an infitesimal unit of time to pass by (ie. you will never see it tick..it will appear to have stopped in time) . If you agree with the last statement then we are half way there. Now lets say this clock moving at the speed of light has a flashlight on it and the flashlight turns on. From your point of view (which is someone just looking at this clock move by) the light from the flashlight would take an infinite amount of time to move ahead of the moving clock because you are already moving at the speed of light and anything changing in time would take an infinite amount of time to do so. Remember we just said above that the ticks of the clock moving at the speed of light is virtually frozen in time ie. you will never see a tick of the clock. What does all of this mean you ask. Anything attempting to move faster than the speed of light, even light itself will suffer a massive time dilation from your point of view. It would literally take an infinite amount of time to move any faster. Not billions, trillions or billions of trillions of years but infinite !
2007-11-25 14:37:26 · answer #5 · answered by Brian 6 · 0⤊ 0⤋
Hi there !
Just like the nature of the wind, just like breeze, just like sound, the quality does not have any bearing effect on the nature of the source. Water if formed, is water, whether it comes from ocean or river or a stram, is composed of Hydrogen and oxygen.
Likewise, the speed of the light does not depend on the speed of the sourse.
best wishes !
2007-11-23 11:17:55 · answer #6 · answered by suresh k 6 · 0⤊ 1⤋
Because light isn't dependent on force or something.......
It is relative velocity that we talk about when we talk about light.
We assume it travels at 29,97,92,458 m / s..
And it has zero mass.
SO even if you were to calculate the force, it would amount to zero.........
Cheers..........
2007-11-23 11:09:16 · answer #7 · answered by Sanjeev 3 · 0⤊ 1⤋