Light and Time, Question for a Physicistd

Sent this question about LIGHT AND TIME, to ASK A MATHEMATICIAN See there website at
askamathematician.com

My Question.
Light is outside time, but if it enters a Bose Einstein Condensate, it slows down. How do we reconcile that the photon is both outside time, but slows down?

Their Answer.
There’s a post here that talks about that a bit.

http://www.askamathematician.com/2013/07/q-what-does-it-mean-for-light-to-be-stopped-or-stored/

Basically, when light exists, it’s traveling at c. When light “slows down”, then at least part of the time it’s not light. In the experiments where light is “stopped” it would be more accurate to say that it is “stored”. Very carefully prepared condensates (not just any old condensate) stops light kinda like a vinyl record stops sound (kinda). Hope that helps!
-Physicist

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