An electron in the hydrogen atom jumps from excited state 
to the ground state. The wavelength so emitted illuminates a photosensitive material having work function 2.75 
. If the stopping potential of the photoelectron is 10 V, then the value of 
is
Text Solution
Verified by ExpertsC
Here, Stopping potential, 
Work function, 
According to Einstein’s photoelectric equation
or 
(i)
When an electron in the hydrogen atom makes a transition from excited state 
to the ground state 
, then the frequency (v) of the emitted photon is given by
[ 
For hydrogen atom, 
According to given problem
(Using(i))
or 
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