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  4. Would the photon lose all its energy at infinity?
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Would the photon lose all its energy at infinity?

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Offline chiralSPO

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Re: Would the photon lose all its energy at infinity?
« Reply #240 on: 04/07/2015 23:13:14 »
The solar spectrum is not continuous. https://en.wikipedia.org/wiki/Fraunhofer_lines
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Offline jccc

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Re: Would the photon lose all its energy at infinity?
« Reply #241 on: 04/07/2015 23:20:51 »
how electrons change orbitals in plasma?
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Offline jccc

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Re: Would the photon lose all its energy at infinity?
« Reply #242 on: 04/07/2015 23:54:39 »
LHC proton beams has no electron, how come the impact produce light?
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Offline jccc

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Re: Would the photon lose all its energy at infinity?
« Reply #243 on: 06/07/2015 01:21:46 »
laser beam/photon beam leave the source, travel at c. each photon carries same amount of energy. therefore, the beam's energy is the same at 1 m or 10 m away from the source.

therefore, the first and the last balloon should take same time to pop. obviously, the videos showed opposite result.

same amount of photon, why carry different amount energy at different distance?

please help me to think, i'm lost.
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Offline chiralSPO

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Re: Would the photon lose all its energy at infinity?
« Reply #244 on: 06/07/2015 02:10:26 »
Quote from: chiralSPO on 03/07/2015 21:29:18
The laser spreads out slightly as it goes (like a flashlight, but to a much smaller extent) so the laser "beam" is actually a laser "cone." The rate that the balloons pop has to do with the intensity of the laser light (unit power per unit area, for instance mW/cm2)

This is why the furthest balloon takes longer to burst than the closest.

Why would you think that distance would effect gravity but not EM? Anything that spreads out into space will have decreased intensity with distance.
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Offline jccc

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Re: Would the photon lose all its energy at infinity?
« Reply #245 on: 06/07/2015 04:39:35 »
Quote from: chiralSPO on 06/07/2015 02:10:26
Quote from: chiralSPO on 03/07/2015 21:29:18
The laser spreads out slightly as it goes (like a flashlight, but to a much smaller extent) so the laser "beam" is actually a laser "cone." The rate that the balloons pop has to do with the intensity of the laser light (unit power per unit area, for instance mW/cm2)

This is why the furthest balloon takes longer to burst than the closest.

Why would you think that distance would effect gravity but not EM? Anything that spreads out into space will have decreased intensity with distance.

i think your laser cone argument is pretty weak. laser beam does not expend.

gravity is f=Gxm1m2/r^2, that's why distance effect gravity.

any matter/particle that spreads out into space will not decrease intensity with distance. newton's law says so. planet's momentum never decrease, comets momentum never decrease, why photons?

i understand, it is tough to accept, the whole world think light is photon particle, einstein got noble for it. qm based on quantum/photon. if it is not true, isn't the world turned up side down?

i really don't know how you feel, but i was shocked when i realized i was right. 

well, we used to be the center of the stars.

 
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Offline jccc

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Re: Would the photon lose all its energy at infinity?
« Reply #246 on: 06/07/2015 09:20:48 »
if photon proved to be wrongton, can we get a nobel?

strange thing is last 2 day many people here but only 2 nuts talked.
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Offline chiralSPO

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Re: Would the photon lose all its energy at infinity?
« Reply #247 on: 06/07/2015 22:01:21 »
Quote from: jccc on 06/07/2015 04:39:35
Quote from: chiralSPO on 06/07/2015 02:10:26
Quote from: chiralSPO on 03/07/2015 21:29:18
The laser spreads out slightly as it goes (like a flashlight, but to a much smaller extent) so the laser "beam" is actually a laser "cone." The rate that the balloons pop has to do with the intensity of the laser light (unit power per unit area, for instance mW/cm2)

This is why the furthest balloon takes longer to burst than the closest.

Why would you think that distance would effect gravity but not EM? Anything that spreads out into space will have decreased intensity with distance.

i think your laser cone argument is pretty weak. laser beam does not expend.

gravity is f=Gxm1m2/r^2, that's why distance effect gravity.

any matter/particle that spreads out into space will not decrease intensity with distance. newton's law says so. planet's momentum never decrease, comets momentum never decrease, why photons?

i understand, it is tough to accept, the whole world think light is photon particle, einstein got noble for it. qm based on quantum/photon. if it is not true, isn't the world turned up side down?

i really don't know how you feel, but i was shocked when i realized i was right. 

well, we used to be the center of the stars.

It's not that the momentum of each photon decreases with distance--that is certainly not true! What changes is the number of photons passing per unit area per unit time (photons per cm2 per second). Why would you say that the laser beam doesn't expand? For thing, you can clearly see the divergence in the video that YOU sent a link to (at the timepoints that I recommended). For another, you can look up:
http://www.quora.com/Is-the-light-from-lasers-reduced-by-the-inverse-square-law-as-distance-grows-similar-to-other-light-sources
http://vlab.amrita.edu/?sub=1&brch=189&sim=342&cnt=1
https://en.wikipedia.org/wiki/Beam_divergence
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Offline jccc

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Re: Would the photon lose all its energy at infinity?
« Reply #248 on: 06/07/2015 23:07:23 »
why is particle beam not bending flame? not produce air flow?

Laser light from gas or crystal lasers is highly collimated because it is formed in an optical cavity between two parallel mirrors, in addition to being coherent. In practice, gas lasers use slightly concave mirrors, otherwise the power output would be unstable due to mirror non-parallelism from thermal and mechanical stresses. The divergence of high-quality laser beams is commonly less than 1 milliradian, and can be much less for large-diameter beams. Laser diodes emit less-collimated light due to their short cavity, and therefore higher collimation requires a collimating lens.
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