JEE Main 2024 Physics question
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
Answer: (D)
Solution
Initially f = 1.5f₀. After halving, f = 0.75f₀ < f₀, which is below the
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