Black Holes & Hawking Radiation: Time Paused in Gravity?

In summary, according to the concept of Hawking radiation and the entropy of black holes, the evaporation process is continuous and eventually, the black hole will no longer have a singularity. However, according to relativity, if we were to approach a super massive black hole, time would appear to slow down or even stop. This raises the question of how Hawking radiation occurs if there is no concept of time. Even if it does occur, it would be a very slow process for large black holes due to their low temperature, but for small black holes, it would be relatively fast. It is important to note that locally, at the position of the black hole, time passes normally despite how it may appear from a distance. While it
  • #1
Abishek
14
0
In the view of Hawking radiation and entropy of black holes, the evaporation is continuous and at one point, there will be no singularity for the black hole. By relativity, if we reach a super massive black hole, then time would be relatively slowed down to a point that it stops (maybe?). Now, if there is no "time" for occurrence of Hawking radiation, then how does it actually occur? Even if it did occur, then will it not be a very slow process?

P.S: I am ready for the stabs of cruel physics professors now...
 
Physics news on Phys.org
  • #2
The formulas are calculated for time as seen by an observer far away - for large black holes, it is a very slow process because the temperature is tiny, but for small black holes it is fast.
 
  • #3
To expand just slightly on mfb's response, what he has pointed out indirectly is that LOCALLY, at the position of the black hole, time passes normally, it does not slow down much less stop.
 
  • #4
It's hard to visualize...
 
  • #5
Abishek said:
It's hard to visualize...
We humans have evolved in an INCREDIBLY limited range of physical phenomena so there are TONS of things in cosmology (the very large) and quantum mechanics (the very small) that we find "hard to visualize" (and a lot of it just flat hard to believe).
 

1. What exactly is a black hole?

A black hole is an astronomical object with a gravitational pull so strong that nothing, including light, can escape from it. It is created when a massive star collapses in on itself, causing its gravity to become infinitely strong.

2. How does time pause in a black hole?

According to Einstein's theory of general relativity, time is affected by gravity. In a black hole, the gravity is so strong that it causes time to slow down and eventually come to a complete stop at the event horizon, the point of no return.

3. What is Hawking radiation?

Hawking radiation is a theoretical concept proposed by physicist Stephen Hawking. It suggests that black holes emit radiation due to the quantum effects that occur at their event horizon. This radiation causes black holes to slowly lose mass and eventually evaporate.

4. Can we see black holes?

We cannot see black holes directly because they do not emit light. However, we can observe their effects on the surrounding matter, such as stars orbiting around them or the distortion of light from objects behind them.

5. Can anything escape from a black hole?

Anything that crosses the event horizon of a black hole is trapped and cannot escape, including light. However, some particles can escape through Hawking radiation, but this is a slow process and does not fully escape the black hole's gravitational pull.

Similar threads

  • Special and General Relativity
Replies
4
Views
180
  • Special and General Relativity
Replies
11
Views
617
  • Special and General Relativity
Replies
8
Views
1K
  • Special and General Relativity
Replies
4
Views
429
  • Special and General Relativity
Replies
1
Views
509
  • Special and General Relativity
Replies
7
Views
1K
Replies
8
Views
2K
  • Special and General Relativity
Replies
12
Views
827
  • Special and General Relativity
Replies
20
Views
818
  • Special and General Relativity
Replies
30
Views
2K
Back
Top