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$\begingroup$ Who said light rays can't travel inside black hole? They certainly do once they cross the event horizon. $\endgroup$
– alamar
Commented Oct 21, 2019 at 15:55
$\begingroup$ I meant that the rays can't travel anymore throughout the Universe. I didn't say they can't travel inside the black hole. $\endgroup$
– Deschele Schilder
Commented Nov 4, 2019 at 19:18

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