(Submitted February 28, 2003)
If light doesn't have a mass, how can it get sucked into a black hole?
In a Black Hole, light traveling outwards towards an event horizon is pulled
back by the very strong gravitational field, because of the warping of
space-time inside the event horizon, regardless of the lack of a photon mass.
This prevents light from ever escaping the Black Hole.
This is also explained in one of our previous answers, "How Gravity
Affects Photons," at:
-Kevin Boyce and Koji Mukai
for "Ask an Astrophysicist"