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MHT CET Medical202623 April 2026Morning ShiftPhysicsDual Nature of MatterActual

In the case of the photo-electric effect, which of the following sentences is NOT TRUE? a. The photo-electrons are emitted only when the frequency of incident radiation is greater than the threshold frequency. b. There is no time lag between incidence of light and emission of electrons. c. The rate of photo-electric emission is independent of the intensity of incident radiation. d. The maximum kinetic energy of emitt

Options

  1. Ad
  2. Bc
  3. Ca
  4. Db

Correct answer

B. c

Step-by-step solution

According to the laws of photoelectric effect: 1. Photoelectric emission occurs only when the frequency of incident light is greater than the threshold frequency. 2. The process is instantaneous, meaning there is no time lag between the incidence of light and the emission of electrons. 3. The rate of photoelectric emission (number of electrons emitted per second) is directly proportional to the intensity of the incident radiation. 4. The maximum kinetic energy of the emitted photoelectrons depends linearly on the f

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