Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A beam of electromagnetic radiation of intensity 
is comprised of wavelength, 
. It falls normally on a metal (work function 
) of surface area of 1 cm² . If one in 10³ photons ejects an electron, total number of electrons ejected in 1s is 
. 
, then 
is:
Text Solution
Verified by ExpertsThe correct answer is:
11
(11)
Energy of photon 
(so photoelectric effect will take place)
Joule
No. of photons falling per second
No. of photoelectron emitted per second
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