When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 
to 0.8 
The work function of the metal is
A
0.65 
B
1.0 
C
1.3 
D
1.5 
Text Solution
Verified by ExpertsThe correct answer is:
B
According to Einstein’s photoelectric equation,
The kinetic energy of emitted photoelectrons is
where 
is the energy of incident radiation and 
is work function of the metal.
As per question,
On solving eqns. (i) and (ii), we get
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