Calculate the number of photons falling per second

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Reference no: EM131172446

When the sun is directly overhead, the surface of the earth receives 1"4 x 10J W/m2 of sunlight. Assume that the light is monochromatic with average wavelength 500 nm and that no light is absorbed in between the sun and the earth"s surface. The distance between the sun and the earth is 1"5 x 10 " m.

(a) Calculate the number of photons falling per second on each square metre of earth"s surface directly below the sun.

(b) How many photons are there in each cubic metre near the earth"s surface at any instant ?

Reference no: EM131172446

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