boris152
TPF Noob!
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- Sep 11, 2006
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Yay! Physics! I can't compute your N right now, but I can give you something to compare it to.
The number of photons emitted from a 100W sodium vapor lamp is 3x10^20 photons per second, or 300,000,000,000,000,000,000 photons per second. If that light were spread onto your square meter grey card, you still have *edit* 69,000 photons hitting . . . each pixel . . . in 1/400 of a second, if I understand your math correctly. (not 690,000 like I put at first! )
The number of photons emitted from a 100W sodium vapor lamp is 3x10^20 photons per second, or 300,000,000,000,000,000,000 photons per second. If that light were spread onto your square meter grey card, you still have *edit* 69,000 photons hitting . . . each pixel . . . in 1/400 of a second, if I understand your math correctly. (not 690,000 like I put at first! )