Does Time Slow Down in a Black Hole?

In summary: So if an observer were to be stuck in the black hole, they would experience time moving more slowly than they would outside the black hole. However, the amount of mass taken by the black hole would still be the same.
  • #1
Redrocket
1
0
It is stated that nothing can escape a black hole and they are gigantic and powerful enough to rotate a galaxy. The gravitational force of space acting on the black hole is immense. On this level of gravity could time it self be stopped in the black hole?

Therefore the amount of mass taken by the black hole could be a lot less then we think it just takes longer as time is slowed down.

Your thoughts…………
 
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  • #2
Redrocket said:
It is stated that nothing can escape a black hole and they are gigantic and powerful enough to rotate a galaxy. The gravitational force of space acting on the black hole is immense. On this level of gravity could time it self be stopped in the black hole?

Therefore the amount of mass taken by the black hole could be a lot less then we think it just takes longer as time is slowed down.

Your thoughts………

My thoughts are that you put your question(s) in pretty unclear fashion, except for time slowing down, which is true for outside observer.

- Black holes are not necessarily gigantic. It is mass/volume ratio, or density, that qualifies region of space, occupied by that mass, to become a black hole.

- Mass is the one that causes gravity, not the space. But it is true that space - time is the "medium" through which gravity acts, so you can tell that space - time is the one who exerts "force" on a object.

- What do you mean by "Therefore the amount of mass taken by the black hole could be a lot less then we think it just takes longer as time is slowed down". It just takes longer for what?
 
  • #3
Redrocket said:
It is stated that nothing can escape a black hole and they are gigantic and powerful enough to rotate a galaxy.
BHs come in all sizes. Some are small, some are huge and live at the centre of galaxies (they do not "rotate the galaxy" - galaxies will do just fine without them.)

Redrocket said:
The gravitational force of space acting on the black hole is immense.
It is the gravitational force of the BH that acts on space, not the other way around.

Redrocket said:
On this level of gravity could time it self be stopped in the black hole?
Why would it?

Redrocket said:
Therefore the amount of mass taken by the black hole could be a lot less then we think it just takes longer as time is slowed down.
The changes in the gravitational field around a black hole propogate at the speed of light.
 
  • #4
mcampbell said:
It is stated that nothing can escape a black hole and they are gigantic and powerful enough to rotate a galaxy.
Er, well, not quite. The supermassive black holes at the centers of galaxies sound impressive, but they still only make up a tiny fraction of the total masses of the stars in galaxies.

mcampbell said:
Therefore the amount of mass taken by the black hole could be a lot less then we think it just takes longer as time is slowed down.
Well, time dilation is fully taken into account by the gravitational field predicted by General Relativity.
 

1. How does time dilation affect black holes?

Time dilation is a phenomenon in which time passes at a different rate for an observer depending on their relative velocity and gravitational potential. As black holes have an enormous gravitational pull, time dilation near them is significant. This means that time will appear to pass slower for an observer near a black hole compared to someone further away. As an object approaches the event horizon of a black hole, time dilation becomes infinitely large, causing time to essentially stop. This is due to the intense gravitational pull that causes massive distortion in space-time.

2. Can time travel occur near a black hole?

According to the theory of general relativity, time travel is possible near a black hole. As mentioned earlier, time slows down near a black hole due to the intense gravitational pull. If an object were to approach the event horizon and then escape it, it would experience a time difference from an observer far away. This time difference could result in the object appearing to have traveled through time. However, the practicality and feasibility of this type of time travel are still uncertain and heavily debated among scientists.

3. How does the concept of time change inside a black hole?

Inside a black hole, the concept of time as we know it breaks down. The extreme gravitational pull of a black hole causes massive distortion in space and time, making it impossible to define time in the same way we do in our normal everyday lives. According to Einstein's theory of general relativity, inside a black hole, time and space become so curved that they eventually meet at a point called the singularity. At this point, our understanding of time and space no longer applies.

4. How does the size of a black hole affect time dilation?

The size of a black hole does not directly affect time dilation. Instead, it is the mass and gravitational pull of the black hole that determines the amount of time dilation. The more massive a black hole is, the stronger its gravitational pull, and the greater the time dilation near it. However, the size of a black hole can indirectly impact time dilation by affecting the strength of its gravitational pull. A smaller black hole may have a stronger gravitational pull than a larger one if it is more compact and dense.

5. Can time affect the formation and lifespan of a black hole?

Yes, time plays a crucial role in the formation and lifespan of a black hole. A black hole is formed when a massive star collapses under its own gravity. The rate at which this collapse occurs is affected by time. The more time a star has to burn through its fuel, the larger it will grow, and the more massive it will be when it eventually collapses into a black hole. The lifespan of a black hole is also affected by time. As time passes, black holes eventually evaporate through a process called Hawking radiation, causing them to shrink and eventually disappear. This process can take trillions of years, depending on the size of the black hole.

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