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At the given point of time, the earth receives energy from sun at 4 cal cm^(-2) mi n^(-1) .Determine the number of photons received on the surface of the Earth per cm^(2) per minute. (Given : Mean wavelength of sun light = 5500 Å ) |
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Answer» Solution :Numberof photons received on the SURFACEOF the earth, from `E = NHV |{:(E = "4 calorie"),("= 4 xx 4.184 J),(LAMBDA = 5500 Å):}` `n = (E lambda)/(hc)` ` = (4 xx 4.184 xx 5500 xx 10^(-10))/(6.6 xx 10^(-34) xx 3xx 10^(8)) = (9.2048 xx 10^(-10))/(19.8 xx 10^(-26)) = 4648xx 10^(16)` ` = 4.648 xx 10^(19)` ` n = 4.65 xx 10^(19)` |
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