Simply put, when physics tells you a thing has a 0 value, be that mass, velocity, or charge, that’s a small white lie. The truth is that the actual value of those measurements is so infinitesimal *as to be effectively* 0, but rest assured, **there is a value.**
This pertains to light as well. Blackholes are so ridiculously massive that the amount they bend space time means any light radiation has to bend back towards the event horizon. The escape velocity is faster than light can travel as well, causing a double whammy.
As time also slows down in extreme gravitational fields, to practically a stop, in the case of a black hole, light can’t move even if it wanted to.
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