and 
are two metals with threshold frequencies 
and 
. Two identical photons of energy 
each are incident on them. Then photoelectrons are emitted in (Take 
)
A
alone
B
alone C
neither 
nor 
nor
D
both 
and 
.
and .
Text Solution
Verified by ExpertsThe correct answer is:
B
Photoelectrons are emitted in 
alone. Energy of electron needed if emitted from 
Again 
Incident energy 
is greater than 
but less than 
.
Hence, photoelectrons are emitted in 
alone.
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