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Light in spacetime

Name: Anonymous 2009-12-18 23:24

So according to Special Relativity light does not travel through time? Is this correct? It's fucking with my brain.

Name: Anonymous 2009-12-18 23:41

no

Name: Anonymous 2009-12-19 12:52

Light travels through time.
http://en.wikipedia.org/wiki/Light_cone

Name: Anonymous 2009-12-24 23:04

>>3
I think he meant is it true that from the frame of reference of the light, no time passes, and so a journey from, say, a light source in a distant star to your eye, though from our frame of reference it takes millions of years, from the frame of reference of the light the journey is instantaneous.

I have heard this several times, however I don't know if it true or not. But light cones refer to light traveling through time in OUR frame of reference, not that of the light.

Name: Anonymous 2009-12-25 7:29

The faster an object goes (relative to the speed of light), the faster time passes for it from its own frame of reference. Therefore if you could hitch a ride on the back of a photon, time would be instantaneous for you.

One of these videos should expand on my paraphrasing:
http://www.youtube.com/watch?v=nNgzqpKZwhE&feature=SeriesPlayList&p=095393D5B42B2266

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