Photons of energy 
and wavelength 
fall on a metal plate and release photoelectrons with a maximum velocity 
. By decreasing 
by 
, the maximum velocity of photoelectrons becomes 
. The work function of the material of the metal plate is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
From the Einstein's photoelectric equation,
Where 
is the velocity of emitted electrons and 
is the work function of metal.
When wavelength is reduced by 
New wavelength 
Maximum velocity 
From eqs. (i) and (ii), we have
work function 
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