A modern 200 W sodium street lamp emits yellow light of wavelength 0.6 `mum`. Assuming it to be 25% efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is
A
`62 xx 10^(20)`
B
`3 xx 10^(19)`
C
`1.5 xx 10^(20)`
D
`6 xx 10^(16)`
Text Solution
Verified by Experts
The correct Answer is:
C
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