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The mean wavelength of light from sun is taken to be 550 nm and its mean power is 3.8 x 10^26 W.

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The mean wavelength of light from sun is taken to be 550 nm and its mean power is 3.8 x 1026 W. The number of photons received by the human eye per second on the average from sunlight is of the order of ………. .

(a) 1045 

(b) 1042 

(c)1054 

(d) 1051

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Correct answer is (a) 1045

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