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Chemistry, 19.09.2019 03:20 nik2lit

Awatt is a unit of power or energy per unit time (1 w = 1 j/s). a semiconductor laser in a cd player has an output wavelength of 780 nm and a power level of 0.120 mw. how many photons strike the cd surface during the playing of a cd 78 minutes in length?

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Awatt is a unit of power or energy per unit time (1 w = 1 j/s). a semiconductor laser in a cd player...

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