Multiple Choice
A pulsed laser has an average output power of 4.0 W. Each pulse consists of light at wavelength 5.0 × 10-7 m and has a 25 ms duration. How many photons are emitted in a single pulse?
A) 1.0 × 1017
B) 2.5 × 1017
C) 3.7 × 1017
D) 5.0 × 1017
E) 7.4 × 1017
Correct Answer:
Verified
Correct Answer:
Verified
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