Suppose we have a 100-W yellow lightbulb (550 nm) 100 m away from a 3-cm-diameter shuttered aperture.
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Suppose we have a 100-W yellow lightbulb (550 nm) 100 m away from a 3-cm-diameter shuttered aperture. Assuming the bulb to have a 2.5% conversion to radiant power, how many photons will pass through the aperture if the shutter is opened for 1/1000 s?
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If the P 100 W light bulb has an efficiency of 25 then the radiated power is P Nhvt where N is th...View the full answer
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