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Answer to Question #81942 in General Chemistry for Hannah Mayo
Question #81942
The watt is the derived SI unit of power, the measure of energy per unit time: 1W=1J/s. A semiconductor laser in a CD player has an output wavelength of 780 nm and a power level of 0.10 mW.
How many photons strike the CD surface during the playing of a CD 69 minutes in length?
How many photons strike the CD surface during the playing of a CD 69 minutes in length?
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