If photons have no mass,why would black holes attract light?

[Murtuza Tipu]

If photons have no mass, why would black holes attract light?
I was told that photons have no mass. However I thought that black holes are called "black" because no light can go escape the gravity force in their vicinity. I somehow think that, if light is just photons, then it should not be affected by gravity. Hence black holes could catch everything but light.

Do I miss something? Is light more than a bunch of photons? Or maybe black holes are not exactly what I think.

 

[DrStupid]

If photons have no mass, why would black holes attract light?

Mass is not necessary to be attracted. The trajectory is independent from mass (both in classical mechanics and relativity).

 

[Murtuza Tipu]

What makes a black hole to attract anybody ? Gravitational force and it depends on mass

 

[ZapperZ]

If photons have no mass, why would black holes attract light?
I was told that photons have no mass. However I thought that black holes are called "black" because no light can go escape the gravity force in their vicinity. I somehow think that, if light is just photons, then it should not be affected by gravity. Hence black holes could catch everything but light.

Do I miss something? Is light more than a bunch of photons? Or maybe black holes are not exactly what I think.

What you missed is reading our Relativity FAQ on this entry:

https://www.physicsforums.com/threads/why-are-massless-photons-affected-by-gravity.511173/

This question has been asked many times and it is sufficiently addressed at the simplest level in that entry.

Zz.

 

[Nugatory]

What ZapperZ said. This thread is closed.