Skip to main content

All Questions

1 vote
1 answer
140 views

Why is a black hole referred to as massive? [duplicate]

I am reading Brief Answers To The Big Questions by Stephen Hawking. In the very first chapter he writes, A typical black hole is a star so massive it has collapsed on itself. It's so massive that not ...
insomniac's user avatar
  • 121
0 votes
1 answer
671 views

How does black hole suck light? [duplicate]

I was asked the same by my friend. I said that gravitational attraction also occurs for high energy particles . My friend said photon is not so very high energy particle which I found on net. He ...
Nobody recognizeable's user avatar
-2 votes
2 answers
93 views

If black hole sucks in all masses, why does it suck in light if it is a form of energy (energy does not have mass)? [duplicate]

I have been searching for a long time for the answer.
Kaustubh Pandey's user avatar
1 vote
1 answer
203 views

Sean Carroll's photons on top of one another

I don't have training in physics, only in mathematics. The following is a passage from From Eternity to here by Sean Carroll, which I wanted to clarify. Photons can be piled on top of one another ...
Hellen's user avatar
  • 113
0 votes
2 answers
3k views

How does a Black hole attract light? [duplicate]

Please no hate for lack of knowledge: I am somewhat fascinated with the subject of black holes. However, I do not understand a concept which is constantly attributed with black holes: that a black ...
Gil Keidar's user avatar
4 votes
2 answers
8k views

If photons have no (rest) mass, why would black holes attract light? [duplicate]

I was told that photons have no (rest) 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 ...
A. Breust's user avatar
  • 143
3 votes
2 answers
3k views

Why do photons add mass to a black hole?

Why do photons add mass to a black hole? When photons are taken irreversibly into a black hole does the mass of the BH increase?
Argus's user avatar
  • 1,241