Question about light and gravity

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epidemis

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Jun 6, 2007
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Does light escaping earth slow with the equivalent of earth's escape velocity while they are in earth's gravity well?
 

ModestGamer

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Jun 30, 2010
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It doesn't slow. c is c, but it does lose energy.


well C is not always actually C as we define it. Light has been observed traveling at different velocitys in the universe a few times now.

does time dilation effect the speed of light ?
 

epidemis

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Jun 6, 2007
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well C is not always actually C as we define it. Light has been observed traveling at different velocitys in the universe a few times now.

does time dilation effect the speed of light ?

The medium that it travel in does. C is the speed of light in a vacuum

Thank you for your help. It makes sense it gains and loses energy :)
 

piasabird

Lifer
Feb 6, 2002
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The real question is what is gravity and what is light. They are one in the same. They are waves. (Over siplification added). Along with this you might consider what is the speed of quantum particles and how do they travel (Through Rock)?

http://www.spaceandmotion.com/Physics-Speed-of-Light-Gravity.htm

This is all a bit above my intelligence level, but this website tries to explain it.

I still wander what keeps light from exiting a black hole. It could be that gravity can become so powerful that it has an effect on time and that has an effect on our perception of light.
 

disappoint

Lifer
Dec 7, 2009
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The real question is what is gravity and what is light. They are one in the same. They are waves. (Over siplification added). Along with this you might consider what is the speed of quantum particles and how do they travel (Through Rock)?

http://www.spaceandmotion.com/Physics-Speed-of-Light-Gravity.htm

This is all a bit above my intelligence level, but this website tries to explain it.

I still wander what keeps light from exiting a black hole. It could be that gravity can become so powerful that it has an effect on time and that has an effect on our perception of light.

So you wonder where photons wander off to in a black hole?

While photons have no mass, and so should not be affected by gravity, the path they travel through is affected by the warping of spacetime in the presence of a large mass. Therefore in the case of a black hole, the mass is so great the photons path bends back into the black hole, there is no escape. It is absorbed into it, where I assume it gets converted into energy in the form of heat.

In other words, the structure of spacetime itself prevents the escape of any photons of light from a black hole. Make sense?
 

Mr. Pedantic

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Feb 14, 2010
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The real question is what is gravity and what is light. They are one in the same
Eh what? One is a photon/electromagnetic. The other is gravitational/hypothetical graviton. Gravity is about 10^36 times weaker than electromagnetism. The only possible resemblances I can see are that both are forces, both can attract objects, and Coulomb's law and Newton's law of gravitation look kind of similar.
 

epidemis

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Jun 6, 2007
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I thought light was both a wave and a particle - if so, then why isn't gravitational red shifting consistent with Newtonian mechanics and regarded as a proof of GR?

Obviously it's not consistent, I just want to know why :)
 

Jeff7

Lifer
Jan 4, 2001
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I still wander what keeps light from exiting a black hole. It could be that gravity can become so powerful that it has an effect on time and that has an effect on our perception of light.
I think that simply has to do with escape velocity. If an object is moving at or beyond the escape velocity of a particular gravity well, then it will be able to escape that gravity well with its own momentum.

A black hole's gravity well is so strong that its escape velocity happens to be higher than the speed of light.
 
May 11, 2008
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So you wonder where photons wander off to in a black hole?

While photons have no mass, and so should not be affected by gravity, the path they travel through is affected by the warping of spacetime in the presence of a large mass. Therefore in the case of a black hole, the mass is so great the photons path bends back into the black hole, there is no escape. It is absorbed into it, where I assume it gets converted into energy in the form of heat.

In other words, the structure of spacetime itself prevents the escape of any photons of light from a black hole. Make sense?

I prefer my idea of gravitational red shift with a black hole : The wavelength of the photon wave is stretched to an extreme because of the stretched out 3d space - time aether. The stretched 3d space -time aether is the result of the accelerated expansion at the center of the black hole. When matter is condensed enough that it's matter acts as a single mass only then this expansion will happen at an accelerated rate. It is interference of the individual fields of the particles when seen as 3d spherical waves. The increase in gravity is also a result of this. Because the wavelength of the photon is stretched out so much, it no longer interacts. It is the same(although reversed effect) as why there is no sharp contrast between a shadow and light(interaction) and why light does not bend around a corner resulting into shadows. It also accounts for missing matter the so called dark matter. The only thing i question about is what happens with the energy of the photon? I never was able to solve that.
 

PlasmaBomb

Lifer
Nov 19, 2004
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Does light escaping earth slow with the equivalent of earth's escape velocity while they are in earth's gravity well?

No it will actually speed up...

(moving from a more dense to less dense region - near earth space != vacuum, in fact interplanetary space != deep space vacuum)
 

Mr. Pedantic

Diamond Member
Feb 14, 2010
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I prefer my idea of gravitational red shift with a black hole : The wavelength of the photon wave is stretched to an extreme because of the stretched out 3d space - time aether. The stretched 3d space -time aether is the result of the accelerated expansion at the center of the black hole. When matter is condensed enough that it's matter acts as a single mass only then this expansion will happen at an accelerated rate. It is interference of the individual fields of the particles when seen as 3d spherical waves. The increase in gravity is also a result of this. Because the wavelength of the photon is stretched out so much, it no longer interacts. It is the same(although reversed effect) as why there is no sharp contrast between a shadow and light(interaction) and why light does not bend around a corner resulting into shadows. It also accounts for missing matter the so called dark matter. The only thing i question about is what happens with the energy of the photon? I never was able to solve that.
You're not making much sense. Can you elaborate?

You guys bit off more than you can chew.
It would be extraordinary if they managed to slow it down in a vacuum. What they did is cool, but not exactly revolutionary.
 
May 11, 2008
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You're not making much sense. Can you elaborate?

I can and i will. But i have decided to do it in a lot of posts. If i try to write it all down at once, the translation to words makes me sometimes forget crucial information creating confusion amongst readers : As such i think it is better to post all related subjects in different posts. Feel free to add any relevant information or correct me when i am wrong because i will do the same... ^_^
I will write down everything i know.

First we must agree on a lot of things and i will do this by asking questions.
It may seem as i am sitting in a high horse, but it is also for a refreshing confirmation for me. As such, i may seem arrogant when writing but that is not the case. I just want to keep myself to the subject and not spend to much words on social communication.

1.
Bonds between particles.
Do we only have the Covalent bond, ionic bond, metallic bond (feel free to add more descriptions of bonds between particles) ?

Do Atoms vibrate in a volumetric way ? Meaning they seem to get get smaller and larger seen from the center of the atom. This is a very fast movement and hardly noticeable. It would disappear in the commonly referred noise.

Are the chemical properties of an element depending on the amount and configuration of protons ?

Are the chemical properties of an element depending on the amount and configuration of electrons ?



I have to go now but when answered i will slowly elaborate what i see in my mind and then slowly explain everything. Once explained, i hope what i have been writing all along makes sense then or can at least be captured in a series of mathematical descriptions...
 
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