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Message: <blockquote data-quote="tomBitonti" data-source="post: 2686879" data-attributes="member: 13107">Photons inside of a black hole ...>> As far as the force that bends light being able to slow it down, that's gravity. It might>> seem obvious to some that this is what happens with a black hole, right? Can't escape>>  'cause it's slowed down too much, right? No again. Gravity accelerates things, but>> acceleration isn't always a change in over all speed; change in direction is acceleration,>> also. *** A photon trapped in a black hole is now orbitting the singularity ... at the*** speed of guess what.My understanding is that there are no stable orbits below the point at which theescape velocity is 1/2 c.  I'd have to go back and read up more to explain why.Note that anything that passes the event horizon has no hope but to meet thecentral singularity.  The usual light cone is bent so much that all available pathspoint inward.A photon in a vacuum always travels at c, even inside of a black hole.  Note that,aside from tidal effects, one can't tell that they have passed the event horizon.Some equations go haywire at the event horizon, but that's because of the choiceof coordinate systems, not because of real (local) physical effects at the horizon.The only place that is mathematically intractable is the central singularity.  Myimpression is that folks generally can't describe the physics of the centralsingularity.</blockquote>