The Theory of Invariance

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Wouldn't this experiment invalidate the postulate?

Bart
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Hi Bart,

MichelsonGalePearson experiment is very interested. However, I don't think it is sufficient to claim that the postulates are not right because inertial motion is different from rotation.

I read the 2nd postulate as "the speed of light is the same for all observers, regardless of their relative motion or motion of the source of the light". So why would the Michelson Gale experiment not meet the criterium for the 'Theory of Invariance?'

Since everything rotates: Earth around it's axis, Earth around the Sun, Solar system around the Milky Way ... when are the criteria really met?

Hi Bart,

In the MichelsonGalePearson experiment, we know the instrument is on the surface of the Earth.

1. The Earth rotates =&gt; the instrument rotates.

2. Result of this MGP experiment was that there exist a fringe shift.

However, this fringe shift <b>is not sufficient </b>to claim that light moved in different velocity, because the fringe shift could be a result of rotating of the instrument (around Earth axis =&gt; angle changed...)

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<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Since everything rotates: Earth around it's axis, Earth around the Sun, Solar system around the Milky Way ... when are the criteria really met?
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Although so many things are rotating, <b>twin stars are the best </b>to confirm that velocity of light does not depend on relative velocity of light source with respect to observer. When a star is moving far away from us, then the other is moving closer to us and their images always come us at the same time.

Thinking aloud about this one, if Lynn is not accelerating at let's say g, then she could have corrected her clock. if those three planets are 100 seconds apart, then at time zero, Dan is in receipt of two simultaneous light pulses. The two light sources are at -50 and 50 seconds. If Lynn's time is indeed running slower, then she would see Dan's planet in the wrong place. She would see what in effect was another space ship passing her at half the speed of light, it would be shortened by about 14%

It's centre of mass would seem to be shifted by Dan's planet "moving" back towards planet c. We have a problem of reciprocity and that's before we even think about what this length contraction is doing to either Dan's or Lynn's atoms. Do electron orbits really become elliptical? Do virtual particles in Lynn's path become elliptical? The vacuum should have properties and it's a player in this game.

A question for you Cindy. What do you think of the "speed" of gravity being much faster than the speed of light? A related question would be how do you feel about negative refractive index?

Hi Stoat,

In Dan - Lynn experiment, I claim that Lynn also see both light bulbs flash simultaneously. Then from this view point, I say that time is absolute, then space is also absolute. There is no time dilation or length contraction in theory of Invariance.

About the speed of gravity....

In Invariance, the speed of gravity is immediately. Velocity of light in vacuum is an property of light. c is not a final limit.

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Coming back to the MPG experiment.

If the experiment is performed on:
- the equator: no fringe shift
- the poles: no fringe shift either

So to me it doesn't look like the rotation of the instrument is a sufficient reason to show a fringe shift.

The reasoning behind the MPG experiment can be explained with the following analogy.

At the airport, there are 2 parallel belts upon which passangers can walk to their terminal.
The 2 belts of equal length (1 km) have a different speed:
- Belt A: 2 km/h
- Belt B: 3 km/h
Dan and Lynn start at the same time and walk at the same speed (5 km/h):
- Dan: first takes belt A, than returns by belt B
- Lynn: first takes belt B, than returns by belt A
Dan arrives after 38,6 minutes
Lynn arrives after 27,5 minutes

Dan and Lynn had agreed to leave a mark every 5 minutes:
- Dan left 7 marks (and 0.7)
- Lynn left 5 marks (and 0.5)

The fringes in the MPG experiment correspond to the differences between the number of marks.
The belt speeds = the exact orbital velocity of the Earth in each of the East-West legs in the experiment.

Can you explain how the fringe shift could be a result of rotating the instrument?