NEET2016Physics-Photoelectric Effect
NEET 2016 Physics Threshold Wavelength MCQ Question
Type: MCQ-conceptual-Medium-Class 12
When a metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is V/4. The threshold wavelength for metallic surface is
A
5λ/2
B
3λ
C
4λ
D
5λ
Correct Answer
Option B
Detailed Explanation
The stopping potential is related to the frequency of the incident light. Using the photoelectric equation, the threshold wavelength can be derived from the given conditions.
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