As a proton falls into a black hole, it accelerates. How large will its mass become as it approaches light speed?
Very massive objects, such as black holes, can cause the velocity of a falling object to reach speeds approaching that of light. Is a black hole’s event horizon the point at which a falling object reaches light speed, or does this only happen at the black hole’s singularity? If the object is a proton, how large would its mass become at the event horizon? Assuming observer A views the event through a telescope, and observer B is the falling object, how will relativity and special relativity effect the observation of B’s time from each perspective?
This question is in the General Section. Responses must be helpful and on-topic.