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JEE Main20244 Apr 2024Evening ShiftPhysicsDual Nature of MatterActual

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Number of photons increases with increase in frequency of light. Reason R: Maximum kinetic energy of emitted electrons increases with the frequency of incident radiation. In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. ABoth A and R are correct and R is the correct explanation of A .
  2. BBoth A and R are correct and R is NOT the correct explanation of A .
  3. CA is not correct but R is correct.
  4. DA is correct but R is not correct.

Correct answer

C. A is not correct but R is correct.

Step-by-step solution

Intensity of light I = nh A Here n is no. of photons per unit time. n = IA h so on increasing frequency v, n decreases taking intensity constant. k _ = h v- So on increasing v , kinetic energy increases.

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