"Harry" wrote in message
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"Dr ***" wrote in message
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Vacuum, Velocity, Gravity and the Speed of light.

*************** Simplified *****************

The following are simple provable or logically deducible facts

a) The speed of light (SOL) is measured constant in vacuum and also in any
given medium. Its speed in vacuum is given the designator c.

As I already explained to you, ONLY when the medium is at rest wrt the
measurement system!
dr
You should have read b) and it got more interesting latter.
Cheers
Dr Ardvark I'll have another :-)
Cheers,
Harald