Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Medium-Class 12
Consider a diagram showing the photoelectric effect where light of a certain frequency is incident on a metal surface. Which of the following factors primarily determines whether electrons will be emitted from the surface?
A
Frequency of the incident light
B
Intensity of the incident light
C
Temperature of the metal surface
D
Area of the metal surface
Correct Answer
Option A
Detailed Explanation
According to the NCERT context, electrons are emitted from a metal surface only if the frequency of the incident light is greater than the threshold frequency. The intensity affects the number of electrons emitted but not the emission itself.
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