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CGP EDU Academic Team
Published on: August 14, 2026
The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 m W and wavelength of 1000 nm, in 0.1 second is x × 10 13 . The value of x is ____. (Nearest integer) (h = 6.63 × 10 −34 Js, c = 3.00 × 10 8 ms −1 )
Text Solution
Verified by ExpertsThe correct answer is:
50
(50)
Energy emitted in 0.1sec.
= 10 −4 J
If ‘n’ photons of λ = 1000 nm are emitted,
then 
(nearest integer)
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