A 
laser operates at a wavelength of 
. The number of photons that will be emitted per second is: [Given Planck's constant 
speed of light 
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
JEE Main 2019
Energy of photon 
is given by
Number of photons of wavelength 
emitted in 
second from laser of power 
is given by
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