Re: michelson morley experiment

bsr3997@xxxxxxxxxxx wrote:
Take a friend and a couple of megaphones out to a field on a windy day.
Use your megaphone to shout to your friend while he uses his to
determine the direction the sound comes from. You will find that he
does not hear the sound come from up wind or down wind but straight
from you. You will find it is best to aim straight at him, not up wind
or down wind.

I think you will not be able to measure the angle accurately enough. Even for 60 MPH wind the angle is less than 5 degrees. And of course in such a wind your friend would not hear you (or even be able to hold a megaphone)....

Theoretically for this case and transverse wind, you (the speaker) must point upwind by arcsin(windspeed/soundspeed); your friend (the receiver) must point directly at the speaker, not upwind or downwind. This is also the case for launching a motorboat across a river -- it must be aimed/steered upriver to arrive transversely at a point opposite from its starting point.


With light, we find no evidence of any motion that must be compensated for, and a directional source always points directly at the receiver, and vice versa (assuming source and detector are at rest in some inertial frame).


It's not so easy to disprove the aether when you use what really
happens as opposed to poor analogies.

"easy", no. But it has been done, for all known aether theories except those that happen to be experimentally indistinguishable from SR. By literally hundreds of different experiments [see the FAQ for references].


Tom Roberts tjroberts@xxxxxxxxxx
.

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