All Questions
12
questions
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Time required to reach Black Hole's Event Horizon from outsider perspective?
Let's imagine a pair of particles that is entangled. One (call it $P_1$) is released and then falls to a black hole from a distant $x_0$, (for example $x_0=5r_s$) and velocity $v_0(=1/2c)$, while the ...
2
votes
1
answer
149
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How can the infalling observer see the event horizon to retreat in front after the observer crossed it (and can't even notice it)?
I have read this question:
so looking toward the singularity, you see the horizon retreating from you as you fall in - even after you've already crossed the horizon.
Are black holes naked ...
- 29k
0
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0
answers
63
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Does someone falling into a black hole see the future falling objects? [duplicate]
For someone falling into a black hole space and time swaps signs - the time coordinate of an outside observer becomes his space coordinate. That means, for any plane parallel to the horizon and inside ...
- 1,161
0
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1
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51
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"Different reality" inside a black hole
why does our perception of space and time entirely change inside a black hole? And why does time not stop inside it from the perspective of the inside observer, however, extremely slows down for the ...
- 27
-1
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4
answers
5k
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Does time exist without Gravity?
If you travel the universe and move into an area where there is negligible gravitational influence, does time stop? As an observer, would this be like watching someone cross the event horizon of a ...
1
vote
1
answer
138
views
What does an external observer see if you shine a laser pointer while crossing an event horizon?
If I understand correctly, the event horizon of a black hole is the boundary beyond which we cannot perceive or describe any events, and all objects appear to freeze when falling in until their light ...
- 21
1
vote
0
answers
56
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Thoughts on Black Holes [duplicate]
Given that time slows to a stand-still at the event horizon of a Black Hole, how long would it take a black hole to form, from the perspective of an outside observer?
It would seem, as a massive star ...
- 25
0
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1
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115
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What (if any) significance exists in the analogy between the speed of light limit and the Schwartzchild radius of a black hole
I have always been intrigued by what seems to be very similar characteristic of the phenomena of traveling very, very fast, (close to the speed of light , and the Schwartzchild radius.
AS a body gets ...
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3
votes
5
answers
3k
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Time paradox inside a black hole
At the event horizon of a black hole, time and the spatial direction toward the center exchange places. The direction inside the black hole from the event horizon to the the singularity in the center ...
- 12.7k
4
votes
2
answers
272
views
Planets close to a black hole
Like in the movie Interstellar, when they go near "gargantua" the big black hole that have a planet orbiting the black hole, they go on the planet and every minute equals X years in earth time. If ...
- 41
0
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1
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686
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Does infalling matter ever cross the event horizon? [duplicate]
Assume you are immortal, then say if you fell towards a blackhole,
to an observer far away you will appear to slow down as you approach event horizon and gradually come to stand still.
However for ...
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163
votes
9
answers
40k
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Does someone falling into a black hole see the end of the universe?
This question was prompted by Can matter really fall through an event horizon?. Notoriously, if you calculate the Schwarzschild coordinate time for anything, matter or light, to reach the event ...
- 358k