BBC Focus Magazine

[The Atheist]

Why doesnt light slow down?

[...]

light does slow down depending what medium it is travelling through.

[M Paul Lloyd]

It does indeed depend on what medium it is passing through '...' aka j1957 in point of fact light has even been stopped dead in its tracks in laboratory experiments.

[The Atheist]

but how does it excelerate after being slowed down?

[...]

i imagine its like, say a certain car running at full throttle on good solid blacktop, or tarmac, travels at 100 mph then it runs into a bad road thats all muddy. eventhough its still at full throttle the drag from the mud will slow it down somewhat but then it hits another road of good tarmac and thus speeds up as the drag is lessened.

@@ aka @@. aka ... aka eggs bennedict, , nothing sinister, just a few cases of forgotten paswords and using other pooters at work etc, oh and the new forum deciding that my forever username isnt good enough for it

[The Atheist]

That would explain if the light had been slowed. But what if the light is stopped dead in its tracks?

[M Paul Lloyd]

This link may.... er... shed some light on the subject?

http://www.news.harvard.edu/gazette/200 ... light.html

[The Atheist]

Thank you for the link it was very informative!!

[Merlo]

would this mean that light is moving through time when it is stopped? (due to relativity and space-time)