Here's the problem I have. Apparently black holes can ingest light because they are so powerful. For this to happen, the light must have some mass, otherwise surely the gravity could not act on it. If the light has mass, it can't travel at the speed of light. Which bit is wrong? I always thought that the black hole would just be absorbing anything that reflected light, which is why they would appear black, but physicists have told me otherwise.
Ginger
