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DieChecker, on 19 October 2012 - 05:58 AM, said:
You're neglecting a little thing called "conservation of energy". You can have the wavelength change with the velocity of light, but you can't have mysterious velocity changes with no change in wavelength.
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What we do know is that within our solar system c is a constant. Transmition times to the Voyager probes, the furthest man made objects fall into totally predictable schedules. There is no known data to support speeds faster then our value for c.
If we're in an adjustment area then that's how it would necessarily seem to us until we can do some testing outside of it, if that ever happens.
Here's something that led me to believe doppler shifting would be maintained even after the adjustment had been made:
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http://www.alternati...itterEffect.htm
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The laser beam starts at the left, passes through the glass, then exits the right of it. We know that light slows down as it passes through a transparent medium. The amount of slow-down is determined by the reciprocal of the refractive index of the medium. In the case of glass it’s around 1.52. But let’s simplify things by making it 1.43. This makes the slow-down amount 0.7, i.e. 70% of light speed.
So as the beam moves through the glass it is going at 0.7c. But what is this speed relative to? To the glass of course. Once the beam enters the glass it starts moving from atom-to-atom within the glass. Each atom becomes a new launch point for the light and that is what the beam moves relative to. To make a weak analogy, it is like someone running first on dry land then through waist-deep water: the water is the medium that determines current speed, not the dry land.
The beam then exits the block and returns to its full speed. It is now travelling at c. But relative to what – the laser or the glass? Again: the glass. The beam can no longer be influenced by the laser since it left that long ago. The final layer of atoms in the glass represents the beam’s most recent launch point so they are what determine the beam’s current speed.
We’ll now complicate the situation a little as shown:
Now there are two lasers. One is standing motionless and the other is moving toward the glass. On the other side of the glass is an observer who will monitor the beams.
Assuming the ballistic theory of light is correct, the light from the moving laser will strike the glass at a slightly higher velocity. For arguments sake we’ll say the laser is going at 0.1c. So the two beams will hit the glass – one at c and the other at 1.1c.
The beams strike the glass. Then what? They both slow down of course. But by how much: does the ‘motionless’ beam slow to 0.7c and the ‘moving’ beam to 0.8c?
Answer: they both slow to 0.7c. The beam is now inside the glass and is moving relative to it. The initial speed of the laser can no longer have any effect on the current beam speed because, as before, the beam is now moving from atom to atom within the glass. Those atoms are what control the speed.
The beams then reach the other side of the glass and exit. The beams now go back to full speed: c. But relative to what – the lasers? No, the glass of course! Like the earlier example, the original beam speed is no longer important. The beams exiting the glass now move with identical speed.
This is not to say the beams will be identical in all aspects. The beam from the moving laser strikes the glass at a higher velocity and its light waves will appear to have a frequency 10% higher. This frequency will be preserved throughout the process. And the observer will see the moving laser beam as having a higher frequency – a Doppler shift! But the final velocity of both beams will be the same: c.
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http://www.alternati...itterEffect.htm
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Edited by nopeda, 23 October 2012 - 09:20 PM.