Re: The bungle in MIchelson Morley Interferometry experiment

Le 03/06/2025 à 15:02, bertietaylor@myyahoo.com (Bertitaylor) a écrit :

The Earth it moves.

No, it doesn't move, except for negligible accelerations.
This is what early physicists like Galileo understood, and what has extended to all of modern physics.
The Earth's speed around the Sun can be considered Galilean at 30,000 meters per second.
Which corresponds, in its own frame of reference, to complete rest.
You can turn all the branches of the Minkowski-Morley apparatus as you wish, and everything happens as if the apparatus weren't moving.
Is it the passing train that's moving? Or me, relative to it? Galileo said it depends on the observer's position. For the train passenger, sitting in his armchair reading, it's the landscape that's moving.
Well, in relativity, it's no different.
I am perfectly still, and it is the Andromeda galaxy that is crossing space, approaching mine at incredible speed.
A resident of Andromeda will regard my words with great astonishment.
The Michelson-Morley apparatus is systematically at rest. Today, we could observe shifts of a few thousandths of a millimeter in its movements, yet nothing is measured; the Earth does not move one bit in the ether.
So, physically speaking, it is not moving (its acceleration towards the sun being negligible); it is in essentially Galilean motion, and since there is no ether, everything happens as if the apparatus were not moving in space. As if it were at absolute rest relative to itself, and in an invariant manner.
 

Bertietaylor

R.H.