Richard Harrison wrote:
It seems likely to me that this
experiment indicates that no medium is required for transmission of
light despite the need of a medium to transport sound.

If the vacuum pump was evacuating ether along with
air molecules, the clock would also be evacuated.

An opaque solid is a medium that will pass sound but
not light. A vacuum is a medium that will pass light
but not sound. One cannot evacuate ether using a
vacuum pump.

In that evacuated space in the bottle, two conducting
plates will be pushed together although connected to
nothing. What does the pushing if not something in
the vacuum medium?
--
73, Cecil http://www.w5dxp.com
"According to the general theory of relativity,
space without ether is unthinkable." Albert Einstein