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NEETPhysicsDual Nature of Matter

With reference to the observations in photo-electric effect, identify the correct statements from below: A. The square of maximum velocity of photoelectrons varies linearly with frequency of incident light. B. The value of saturation current increases on moving the source of light away from the metal surface. C. The maximum kinetic energy of photo-electrons decreases on decreasing the power of LED (light emitting dio

Options

  1. AA and B only
  2. BA and E only
  3. CC and E only
  4. DD and E only

Correct answer

B. A and E only

Step-by-step solution

From Einstein's photoelectric equation, Maximum kinetic energy, K E m a x = 1 2 m v m a x 2 = h f - ϕ , where, v m a x is maximum velocity of photoelectrons, h is Planck's constant, f is frequency of incident light and ϕ is work function of metal. From above relation, we can see that the square of maximum velocity of photoelectrons varies linearly with frequency of incident light. If we increase the intensity of the incident radiation by keeping the frequency constant, then the value of saturation current increases

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