Quote:
Originally Posted by sjh
If you ask a physicist the speed of light their first response would be, "in media or in vacuo?"
The constraint on the speed of light only applies in vacuo.
This quote was given -
It's not quite correct.
I offered what a physicist would say, "the speed of light in vacuo is fixed."
If useful use it. If not ignore my remark.
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What I wrote is exactly correct. The speed of light varies with the medium through which it passes. More generally, electromagnetic radiation ... etc.
In each medium it is constant for that medium.
Space, absent matter, remains a medium.
Michaelson-Morley demonstrated the ether is unnecessary for the propagation of light but did NOT demonstrate that space (absent matter) is non-existent.