Black Hole - energy and matter Can someone explain what is happening with energy (e.g. light) and matter which was collected by a black hole?
I suppose that matter builds a black hole's mass and size, but what about light? Does it just disappear? But to generate light, the star consumed matter (mass).
No, the light doesn't just disappear, it adds to the black hole's mass in accordance with $E=mc^2$. So if a star produced light from $m$ kilograms of mass and all that light fell into a black hole, the black hole's mass would increase by $m$ kilograms.