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How many photons per second are emitted by a 12.3 mW laser that has a wavelength of 21.3 um? A. 2.45 x 1010 B. 3.18

How many photons per second are emitted by a 12.3 mW laser that has a wavelength of 21.3 um? A. 2.45 x 1010 B. 3.18 x 1012 C. 1.32 x 1018 D. 4.76 x 1019

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