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JEE Main2012PhysicsDual Nature of MatterActual

Photoelectrons are ejected from a metal when light of frequency v falls on it. Pick out the wrong statement from the following.

Options

  1. ANo electrons are emitted if v is less than W / h , where W is the work function of the metal
  2. BThe ejection of the photoelectrons is instantaneous.
  3. CThe maximum energy of the photoelectrons is hu.
  4. DThe maximum energy of the photoelectrons is independent of the intensity of the light.

Correct answer

C. The maximum energy of the photoelectrons is hu.

Step-by-step solution

According to photo-electric equation : K . E _ = h v- h v₀ (Work function) Some sort of energy is used in ejecting the photoelectrons.

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