What is happended to time in black hole?

[Saleque Ahmed]

Time is a dimension that always moves forward, never backwards. But as we move closer to the black hole, time first turns 45% and then 90% and time changes its axis. The question is where does the time go?

[paulsutton]

1 hour ago, Saleque Ahmed said:

Time is a dimension that always moves forward, never backwards. But as we move closer to the black hole, time first turns 45% and then 90% and time changes its axis. The question is where does the time go?

So is this related to the idea that time slows down as it approaches the speed of light. ?

[Endy0816]

3 hours ago, Saleque Ahmed said:

Time is a dimension that always moves forward, never backwards. But as we move closer to the black hole, time first turns 45% and then 90% and time changes its axis. The question is where does the time go?

 

That would be past the Event Horizon.

My understanding is that our dimensions would swap. Time for Space. 

If memory serves, The Universe and Dr. Einstein gives a pretty good overview:

https://www.amazon.com/Universe-Dr-Einstein-Lincoln-Barnett/dp/0486445194

I like to visualize the dimension of time as a road we're traveling along. We're stuck traveling along it so as a result we observe time as always advancing(odometer ticking up). Not necessarily the same as what time itself is doing.

 

 

Edited September 3, 2022 by Endy0816

[Markus Hanke]

5 hours ago, Saleque Ahmed said:

Time is a dimension that always moves forward, never backwards. But as we move closer to the black hole, time first turns 45% and then 90% and time changes its axis. The question is where does the time go?

It isn’t time that “rotates”, but the light cone associated with events. That’s not the same.

When we say that time and space trade places at the event horizon, then what we really mean is that beyond the horizon, ageing into the future necessarily corresponds to a decay in radial position. This means, in practical terms, that there cannot be any stationary frames below the horizon - no matter how much force you exert to counter gravity, you will continue to fall downwards. This is due to the geometry of spacetime, so it is inevitable.

[md65536]

On 9/3/2022 at 11:53 AM, paulsutton said:

So is this related to the idea that time slows down as it approaches the speed of light. ?

In some ways, not others.

No: The possible paths of light depend on where a light source is relative to a black hole, but does not depend on the speed of the source. In diagrams of flat spacetime, the lines representing light do not rotate for different observers. The lightcones don't distort or rotate.

Yes: In some ways you can treat the spacetime around a black hole as if it's falling into it (and taking the light cones with it). You can apply SR in a local spacetime for insights on how for example an inertial in-falling observer sees things differently than one hovering above the event horizon.