Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Maximum kinetic energy of a photoelectron is 
, when the wavelength of incident light is 
. Its energy becomes 4 times, when wavelength is reduced to 
, then work-function is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let 
be the work-function which corresponds to the energy required to pick out an electron from a material then,
On dividing Eqs. (i) and (ii), we get
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