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The SR Question of the Century

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=================================

Why has no one simply used two clocks on a table

to measure light's one-way speed?

=================================

=================================

(Note: No, Roemer did not do it; he used slow

clock transfer, where one clock spanned the

Earth's orbit, and since moving clocks run

slow, his clocks were asynchronous.)

For those who may need it, here is a detailed

version of my question:

=================================

Given two new atomic clocks still in their

shipping crates, how would anyone use these

clocks to measure light's one-way speed in

a way that is proved to be correct?

=================================

Basically, I am speaking simply of the one-way

version of the Michelson-Morley experiment.

And if you happen to believe that the MMx

round-trip experiment somehow even _implied_

one-way invariance, then you need to prove

this via the critical case of a frame that

moves wrt the light source.

The given question is extremely important

because an incorrect measurement of light's

one-way speed means incorrect measurements

of all one-way speeds and all time spans

involving two or more clocks.

The given question is also extremely important

because special relativity (our current theory

of time measurement) is based solely upon

Einstein's light postulate, which claims light

speed invariance in the one-way case.

=================================

=================================

Why has no one simply used two clocks on a table

to measure light's one-way speed?

=================================

=================================

(Note: No, Roemer did not do it; he used slow

clock transfer, where one clock spanned the

Earth's orbit, and since moving clocks run

slow, his clocks were asynchronous.)

For those who may need it, here is a detailed

version of my question:

=================================

Given two new atomic clocks still in their

shipping crates, how would anyone use these

clocks to measure light's one-way speed in

a way that is proved to be correct?

=================================

Basically, I am speaking simply of the one-way

version of the Michelson-Morley experiment.

And if you happen to believe that the MMx

round-trip experiment somehow even _implied_

one-way invariance, then you need to prove

this via the critical case of a frame that

moves wrt the light source.

The given question is extremely important

because an incorrect measurement of light's

one-way speed means incorrect measurements

of all one-way speeds and all time spans

involving two or more clocks.

The given question is also extremely important

because special relativity (our current theory

of time measurement) is based solely upon

Einstein's light postulate, which claims light

speed invariance in the one-way case.

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