A monochromatic source , emitting light of wavelength , 600 nm , has a power output of 66 W. Calculate the number of photons emitted by this source in 2 minutes.
Asked by vinitapahel123 | 13th Dec, 2015, 12:04: PM
Wavelength, λ = 600nm = 6×10-7 m
Power, P = 66 W
Energy of one photon, E =
Let n is the number of photons emitted per second such that the energy emitted in one second is 66 J.
nE = 66
Total number of photons emitted by source in 2 mins = n × 2 × 60 = 2.388 × 1022 photons. [2 mins = 2 × 60]
Answered by Faiza Lambe | 13th Dec, 2015, 03:41: PM
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