When two monochromatic lights of frequency v and v/2 are incident on a photoelectric metal, their stopping potential becomes 
and 
, respectively. The threshold frequency for this metal is [NEET 2022]
A
3v
B
C
D
2v
Text Solution
Verified by ExpertsThe correct answer is:
C
Using Einstein's photoelectric equation,
When 
and 
, then
…… ..(i)
Again, when 
and 
, then
…… .(ii)
Dividing Eq. (i) by Eq. (ii), we get
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