seeing the sun at nigh

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seeing the sun at nigh
« on: June 09, 2012, 11:11:44 AM »
Even though we cant see the sun at night on a fe with the naked eye do to all of the particals in the atmosphere couldnt one see it using IR ?

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Ski

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Re: seeing the sun at nigh
« Reply #1 on: June 09, 2012, 03:45:25 PM »
Infrared refracts/diffuses in the same manner as visible light.
"Never think you can turn over any old falsehood without a terrible squirming of the horrid little population that dwells under it." -O.W. Holmes "Truth forever on the scaffold, Wrong forever on the throne.."

Re: seeing the sun at nigh
« Reply #2 on: June 09, 2012, 04:13:44 PM »
Is Ir and Ir filtering not used to penatrate atmosphiric haze in photograhy ?

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Ski

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Re: seeing the sun at nigh
« Reply #3 on: June 09, 2012, 04:15:11 PM »
It scatters at a slightly lower rate because of it's slightly lower wavelength. Rayleigh scattering effects IR, just like it effects the visible light spectrum.
"Never think you can turn over any old falsehood without a terrible squirming of the horrid little population that dwells under it." -O.W. Holmes "Truth forever on the scaffold, Wrong forever on the throne.."

Re: seeing the sun at nigh
« Reply #4 on: June 09, 2012, 04:33:43 PM »
How then are IR cameras used to see firefighters thtough smoke and dust

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Ski

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Re: seeing the sun at nigh
« Reply #5 on: June 09, 2012, 05:02:28 PM »
It would really depend on the wavelength.

"Never think you can turn over any old falsehood without a terrible squirming of the horrid little population that dwells under it." -O.W. Holmes "Truth forever on the scaffold, Wrong forever on the throne.."