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JEE Main 2024 (31 Jan, Shift 2) · Photoelectric Experiment: Intensity, Stopping Potential & Graphs

Photoelectric Experiment: Intensity, Stopping Potential & Graphs question from JEE Main 2024 (31 Jan, Shift 2)

Q36JEE Main 2024 · 31 JAN · SHIFT 2Medium

Photoelectric Experiment: Intensity, Stopping Potential & Graphs

In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the surface of photosensitive material. Now if the frequency is halved and intensity is doubled, the number of photo electrons emitted will be:

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Answer: (c)

$\nu = 1.5\nu_0$ ; halved: $\nu' = 0.75\nu_0 < \nu_0$ .
Below threshold no electrons are emitted, even if intensity is doubled.
So the answer is (c) zero.

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