bbgyuli5243 bbgyuli5243

12-03-2024
Physics

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How many photons are produced in a laser pulse of 0.201 J at a wavelength of 571 nm?
a) 1.5 x 10¹9
b) 2.0 x 10¹9
c) 2.5 x 10¹9
d) 3.0 x 10¹9

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