A laser emits photons of energy 5.0 eV with a power of 10-2 W. How many photons are emitted each second?
A) 4.0 × 1014
B) 2.7 × 1015
C) 5.0 × 1018
D) 3.1 × 1021
E) 2.5 × 1021
Correct Answer:
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