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Author Topic:   Is the speed of light constant between galaxies?
Son Goku
Posts: 1153
From: Ireland
Joined: 07-16-2005

Message 50 of 66 (680323)
11-19-2012 4:33 AM
Reply to: Message 48 by Percy
11-18-2012 9:16 PM

Re: Constant Speed of Light
Massive particle is indeed any particle with mass.

The different paths in spacetime followed by massive and massless particles will be visible to us as the particles following different paths through space.

As cavediver said, this is what makes geometry with a time dimension very different to purely spatial geometry. When all the dimensions are spatial there is only one type of path, our normal intuitive idea. When there is a time dimensions there are three separate types of paths.

Edited by Son Goku, : Small addition.

This message is a reply to:
 Message 48 by Percy, posted 11-18-2012 9:16 PM Percy has acknowledged this reply

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