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Author Topic: Can you slow down light?  (Read 9428 times)

Offline kenhikage

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Can you slow down light?
« Reply #25 on: 05/10/2010 03:33:29 »
Quote
Photons don't bounce on atoms, they are absorbed and another photon is emitted... This takes some times so you could think it slows down the photon but it is not the same one...
Interesting. What causes it to emit, just having too much energy to store it all? If so, it seems strange that it would accept more energy and kick out old, rather than simply letting the original photon pass by.

Atoms exist only in specific quantum energy level states. Each state is associated with electrons energy levels. An atom can be excited to another higher energy quantum state if it is hit by a photon of the same energy as the difference of the 2 quantum states. It results in a higher quantum vibration state of an electron revolving around the atom nucleus. The atom will then emit another photon in order to return to a more stable quantum state (probably of the same energy as the prior photon).

Late late reply, sorry. That makes sense. What determines the energy requirements of a quantum state?
 

Offline kenhikage

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Can you slow down light?
« Reply #26 on: 05/10/2010 03:50:41 »
How Do You Catch An Atom And Pin It Down? :o
Could one do this to light using, say, leptons? Something else?
 

Offline lil_muz

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Can you slow down light?
« Reply #27 on: 06/10/2010 06:08:33 »
yes, light slow down in denser transparent medium. such as water, glass, and prism..
newbielink:http://en.wikipedia.org/wiki/Speed_of_light [nonactive]
« Last Edit: 06/10/2010 06:13:17 by lil_muz »
 

Offline kenhikage

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Can you slow down light?
« Reply #28 on: 08/10/2010 11:57:27 »
yes, light slow down in denser transparent medium. such as water, glass, and prism..
http://en.wikipedia.org/wiki/Speed_of_light
Please see the first post on this topic.
 

Offline syhprum

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Can you slow down light?
« Reply #29 on: 08/10/2010 15:59:42 »
I understand that the subliminal speed of light in a material of refractive index of more than 1 is commonly attributed to its absorbsion and re emission by atoms.
Is this not now considered rather over simplistic what other explanations are offered.
 

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Can you slow down light?
« Reply #29 on: 08/10/2010 15:59:42 »

 

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