If light doesn't have mass then why does a black hole effect it?

If light doesn't have mass then why does a black hole effect it?

Because it steals it.

F R A M E D R A G G I N G

Because Lorenz transformations has energy and momentum conservation built in. Because of this, even mass less particles have non 0 momentum via
E^2 = (mc^2)^2 + (pc)^2

And light definitely has energy.

This suggests that light can be affected by forces. You need gr, not Sr to explain this intermediate effect but it's there.

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Probably something to do with gravity gaining certain properties when its sufficiently present, thus even being able to act on light.
I'm pretty sure that, even though gravity is considered a weak force, it becomes one of the strongest forces once that certain threshold has been crossed (i.e. black hole)

This is a surprisingly good question for a gorilla post.

a brainlet way to think of it is that gravity is not a force but bending of spacetime. in a black hole space time is bent in such a way and to such an extent that it's impossible to escape from it

I farted really loud and my basketball shorts ripped.

Because a black hole also affects and warps the space-time surrounding it. Light is thereby consequently affected and will have its trajectory changed if it traveled on that same space-time.