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Solar radiation falls on Earth's surface at a rate of 1500 W/mg. Assuming that the radiation has an average wavelength of 570 nrn, how many

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Solar radiation falls on Earth's surface at a rate of 1500 W/mg. Assuming that the radiation has an average wavelength of 570 nrn, how many photons per square meter per second fall on the surfaces? The speed of light is 3 x 108 m/s and Planck's constant is 6.62607 x 1034 J - s. Answer in units of photon/m2 - s

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