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/sci/ - Science & Math


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File: 30 KB, 955x599, light.jpg [View same] [iqdb] [saucenao] [google]
5124400 No.5124400 [Reply] [Original]

If the speed of light is the fastest speed in the universe then why is it that when it is at the edge of a black hole it disappears? Wouldn't this suggest that it is now traveling faster than the original light which was moving at approximately the speed of light? Or does it slow down light?

>> No.5124416

Black holes fuck with space AND time in a serious way. There's no FTL behavior here.

Start with special relativity before you try to understand general relativity (spacetime warping from gravity)

>> No.5124421

no.

>> No.5124425

The event horizon of a black hole moves outward continually at the speed of light. It doesn't get anywhere because the space above it is continually being (to speak roughly) stretched.

>> No.5124429

>>5124425
OP here. I don't wanna sound like a retard, but could you please explain this? Or at least send me a link that does. Thanks.

>> No.5124433

>>5124416
You clearly don't!

>> No.5124447

>>5124429
You can try
http://casa.colorado.edu/~ajsh/schwp.html

The important thing to understand is that general relativity explains gravitation in terms of abandoning the rules of geometry you are familiar with and replacing it with a new version of geometry where geometry itself can change in response to matter.

>> No.5124459

If the speed of light is being pulled in opposite direction AT the speed of light, photons do not reach us therefore visible light cannot be seen. Why havent i heard of this variable before? Is it obvious or not apply?

>> No.5124460
File: 37 KB, 400x290, general-relativity[1].jpg [View same] [iqdb] [saucenao] [google]
5124460

>>5124447
>http://casa.colorado.edu/~ajsh/schwp.html
So like this shit in the pic?

>> No.5124468
File: 35 KB, 692x313, teaching_physics[1].png [View same] [iqdb] [saucenao] [google]
5124468

>>5124459
"speed of light" is not a thing that can be moved. But if you're talking about space itself, then sure.

At some point we just run into pic related.

>> No.5124469

>>5124459
My question was poorly worded, I don't mean it disappears from sight, I mean it disappears into the black hole.

>> No.5124476

>>5124469
If light gets sucked into the black hole does that mean that the black hole pulls light with a higher force making it move faster than it originally (at the speed of light) was?

That's basically the question

>> No.5124480

>>5124476
tl;dr no

>> No.5124484

OP, light doesn't accelerate as it falls into a black hole. The classical ideas of gravitational attraction don't work on light because it's massless.
Instead, you must picture things with mass as bending spacetime. Light always goes at c, following the shortest geodesic between points.

>> No.5124495

>>5124484
So light isn't getting sucked in it's going in on purpose?

>> No.5124508

so lights falling in as if space-time and light are connected like one not separate things? if space time and light are connected in some way it might help me understand lol

>> No.5124509

>>5124495
I'm sorry, I understand somewhat but I'm just going to go sleep because I'm tired.

http://answers.yahoo.com/question/index?qid=20090719205720AABx3ok

>> No.5124515

>>5124508
Just look at it as light blasting through space at c, but the space is being sucked into the hole even faster (within the event horizon).

If you want to really understand this, you have to study GR.

>> No.5124524

what about quarks? what about electron orbit? electrons dont orbit. electron clouds. electrons can be any where any time within the shell/cloud. higgs boson? im going to /b/

>> No.5124548

>>5124400
Your ship, traveling at exactly the speed of light (blindly accept this as a possibility) is moving toward the tangent of an event horizon of a black hole. Your ship's trajectory is suddenly and significantly altered as you pass the event horizon and curve toward the singularity, but you feel no acceleration. It feels as if you're still traveling in a straight line. Your speed remains the same, because the space around you is being curved into the black hole, rather than you being pulled through space into the black hole. Once you pass the event horizon all directions in space point toward the singularity.

This is probably wrong.

>> No.5124554

>>5124468
The big problem with that analogy is that it doesn't illustrate spaceTIME curvature.

A better analogy is you and the earth as longitude lines on a globe, with north = time.

>> No.5124567

>>5124554
>the problem with this analog is that you grasped a concept in three dimensions, not four. Let me make things more difficult to understand

>> No.5124570

>>5124554
I assume the equator is the event horizon and the north pole is the singularity? An elegant example. I'm thinking this will be harder for OP to understand as well.

>> No.5124573
File: 26 KB, 550x573, 550px atom.svg.png [View same] [iqdb] [saucenao] [google]
5124573

So if you got sucked into a black hole and was someone able to maintain your current consciousness. Obviously you'd be ripped apart in reality, you would live forever, in relation to an observer who remains in our current gravitational plane.

>> No.5124575

>>5124573
I don't understand. Is this a question?

>> No.5124583

>>5124575
somehow*
I'm not sure