A beam of electromagnetic radiation of intensity 
is comprised of wavelength, 
. It falls normally on a metal (work function 
) of surface area 
. If one in 
photons ejects an electron, total number of electrons ejected in 
is 
, then the value of 
is
Text Solution
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For photoelectric effect to take place, energy should be greater than work function Now,
Therefore, photoelectric effect takes place
Here 
is the number of photons emitted.
Where, 
is number of incident photon
Since, 1 out of every 1000 photons are sucessfull in ejecting 1 photoelectron
Therefore, the number of photoelectrons emitted is
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