Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Pulsed lasers are powerful sources of nearly monochromatic radiation. Lasers that emit photons in a pulse of 5.00 ns duration with a total energy in the pulse of 1.213 J at 875 nm are commercially available. Thus, average power energy ( 
) associated with such a pulse and number of photons emitted in such time are
Power energy Js -1 (W) Number of photons
emitted
A
32.166 
10 26
B
61.454 
10 26 C
53.394 
10 17 D
41.083 
10 18
Text Solution
Verified by ExpertsThe correct answer is:
C
Also, 
No. of photons emitted 
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