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Suppose that you have a 10 Watt green LED lamp, that emits light at a wavelength of 535 nm uniformly in all directions. 1) Suppose that you look at the lamp from a distance of 3 meters. If your face has an area of 175 cm2 facing the LED, how many photons from the lamp hit your face each second?
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Suppose that you have a 10 Watt green LED lamp, that emits light at a wavelength of 535 nm uniformly...
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