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
Answer:A
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