There's something bothering me about the event horizons of black holes. The Schwarzchild radius (as I see it) is basically the distance from a center of mass at which the escape velocity is the speed of light. The way escape velocity is defined though is the speed a body must have to "reach infinity," or leave the gravitational field, from a given radius in the proximity of a gravitating body. Couldn't a photon at or inside the event horizon leave the vicinity (say to a nearby galaxy) with corresponding red shift, then "re-gravitate" to the black hole? The red shift equation says a photon emitted from the Schwarzchild radius will be infinitely red-shifted at infinite distance (as r->inf), but it doesn't have to travel to infinity to be observed or absorbed. Am I thinking of this to classically? Do photons not make elliptical orbits in gravitational fields like planets?(adsbygoogle = window.adsbygoogle || []).push({});

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# Escaping the Schwarzchild Radius

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