Matter travelling faster then light inside a black hole

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Discussion Overview

The discussion revolves around the concept of whether matter can travel faster than light inside a black hole, particularly focusing on the behavior of objects as they approach and cross the event horizon. The scope includes theoretical considerations and conceptual clarifications related to black hole physics.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions if it is possible for matter to exceed the speed of light inside a black hole, suggesting that as one approaches the event horizon, the speed of light is reached, and beyond it, the speed could be greater than light.
  • Another participant asserts that the physical speed of light remains constant in a vacuum, but the coordinate speed can vary based on how spacetime is charted.
  • A participant expresses confusion about the behavior of an object, specifically a brick, as it approaches the event horizon, questioning if its speed would increase beyond the speed of light after crossing the horizon.
  • It is noted that an inertial object does not have an intrinsic speed but rather a speed relative to other objects, which complicates the understanding of speed in the context of black holes.
  • One participant acknowledges the complexity of spacetime inside a black hole and decides to refrain from further contemplation on the topic, indicating a sense of overwhelm.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of speed in relation to black holes, particularly regarding the implications of crossing the event horizon. There is no consensus on whether matter can exceed the speed of light inside a black hole, and the discussion remains unresolved.

Contextual Notes

The discussion highlights the complexities of spacetime and the nature of speed in extreme gravitational fields, with participants acknowledging the limitations of their understanding and the need for careful consideration of definitions and frameworks used in the discussion.

stragz
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hi, I'm most likely the dumbest person around here
i study electronics, and haven't seen anything like this at school,
but i was doing some own research for a paper (for my physics teacher)
and i rather got confused when i read some sites
so my question is :
is it possible to travel faster then light INSIDE a black hole?

i get the fact that at the event horizon:
gravity pull= speed of light, this is the "frozen effect", the light photons force to move away from the black hole and the force drawing them in is equal( like 2 persons pulling a string equally)

now since as you come closer to the black hole you come closer to the speed of light
with when you reach the event horizon v=1c
right?

would it not be logic that beyond the horizon v>1c
so outside event horizon v<1c
on top of event horizon v=1c
beyond the event horizon v>1c

my question now is, where lies my mistake?(if i made one)


i'm not trying to be a know-it-all
its is rather disturbing and hard to grasp how mucht a dimension as time is being influcent by gravity, if someone could explain this to me, i would find it easier to grasp,
if you want to anwser with formulas, be my guest, i had enough maths in school and i know how to use a search button to understand the formulas myself

feel free to point out my gaint flaws in my assumption
after all the only physics I've had so far about this subject were the ones that google showed me
so please correct me
 
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The physical speed of light is constant in vacuum everywhere.

However the coordinate speed of light depends on how you chart spacetime.
 
hmm i understand, but that still leaves me with the question if i throw a brick in a black hole
and it comes closer to the speed of light as it approaches the event horizon
and if i understand correctly from what I've read of various sites, the brick would have the speed of light crossing the event horizon
would the speed not increase further then beyond the event horizon?
or am i missing a crucial point here?
 
stragz said:
hmm i understand, but that still leaves me with the question if i throw a brick in a black hole
and it comes closer to the speed of light as it approaches the event horizon
and if i understand correctly from what I've read of various sites, the brick would have the speed of light crossing the event horizon
would the speed not increase further then beyond the event horizon?
or am i missing a crucial point here?
The crucial point you are missing is that an inertial object (such as the brick you mention) does not increase its physical speed, it has no speed by itself. It has only a speed in relation to something else. If you want to track such a relation you have to chart spacetime, and then the relative speed of this brick will depend on what chart you use.
 
and from what I've read on those other sites, spacetime inside the black hole is distorted beyond comprehend...
i understand your point now, I'm not even going to bother to even think further upon it,
it would raise more questions then anwsers for me...
i'm just going to hand in my report and forget about the enitre case :)
thank you for your help:)
 

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