NEET2022Physics-Modern Physics
NEET 2022 Physics Photoelectric Effect MCQ Question
Type: MCQ-numerical-Hard-Class 12
When two monochromatic lights of frequency, ν and ν/2 are incident on a photoelectric metal, their stopping potential becomes Vₛ/2 and Vₛ respectively. The threshold frequency for this metal is:
A
2ν/3
B
ν/3
C
2ν
D
3/2ν
Correct Answer
Option A
Detailed Explanation
Using the photoelectric equation, the stopping potential is related to the frequency of the incident light. Solving the equations for the given conditions, the threshold frequency is found to be 2ν/3.
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