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Length contraction of a black hole
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greysky
May 12, 2012, 6:02:43 PM5/12/12
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If an observer measured the diameter of the Schwarzschild radius of a black
hole as it moved past him at a relativistic speed, would the radius remain
circular, or would it be length contracted in the direction of motion? If
it is contracted, what can be said about the case where the black hole was
moving at the speed of light? Would the length in the direction of motion be
contracted to zero thus exposing the singularity?
G-
hole as it moved past him at a relativistic speed, would the radius remain
circular, or would it be length contracted in the direction of motion? If
it is contracted, what can be said about the case where the black hole was
moving at the speed of light? Would the length in the direction of motion be
contracted to zero thus exposing the singularity?
G-
Androcles
May 12, 2012, 6:04:36 PM5/12/12
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"greysky" <ftl...@hotmail.com> wrote in message
news:4fae...@news.x-privat.org...
> If an observer measured the diameter of the Schwarzschild radius of a
> black hole
Forget the "if". He'd have to find one first.
> black hole
xxein
May 14, 2012, 8:46:09 PM5/14/12
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the radius defined to be the radius at which incoming matter is sucked
into a BH's lair by gravity at c. So unless you are willing to say
that this velocity will increase to c*sqrt(2) as it gets to the
surface of the BH (r=M, M being the radius of the BH as measured in
meters of light), I see no point in discussing a length contraction
under such a scenario.
For your second question, Wouldn't it be the same as if your rocket
flew past a BH at nearly c using the apparent motion of the BH? But
don't get close. Your speed will fall. You will find out that the
gravity of the BH will vectorialy subtract your forward speed just as
Einstein had to conclude and was subsequently found to be true (light
bends double than what was previously predicted). But even Einstein
didn't really know why outside of a mathematic.
Third question: Would it expose a singularity? Well, consider that
light almost grazing 2M (Schwarzschild radius), could be physically
interpreted as light slowing down to sqrt(5)*c at that point. It will
have double the bend that Einstein came up with in his math and
subsequent observation. But I don't know if such an observation with
a fly-by is possible. But I can tell you that the vectors work.
Tyler Dresden
May 15, 2012, 8:53:47 PM5/15/12
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https://picasaweb.google.com/lh/photo/8Qi_yHv77_RNx2RzXda6adMTjNZETYmyPJy0liipFm0?feat=directlink
Tyler Dresden
May 28, 2012, 11:05:59 AM5/28/12
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Third question: Would it expose a singularity? Well, consider that
light almost grazing 2M (Schwarzschild radius), could be physically
interpreted as light slowing down to sqrt(5)*c at that point.
micro...@hotmail.com
May 28, 2012, 11:03:26 PM5/28/12
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>
>
Space ends at the event horizon with time.
There is no proper space left.
Light leaves the black hole at C.
Mitchell Raemsch
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