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Most Important Selected Qs for JEE AdvancedPhysicsDual Nature of Matter

Photoelectric effect supports the quantum nature of light because:

Options

  1. AThere is a minimum frequency of light below which no photoelectrons are emitted.
  2. BThe maximum K.E. of photoelectrons depends only on the frequency of light and not on its intensity.
  3. CEven when the metal surface is faintly illuminated by light of wavelength less than the threshold wavelength,
  4. DElectric charge of photoelectrons is quantized.

Correct answer

C. Even when the metal surface is faintly illuminated by light of wavelength less than the threshold wavelength,

Step-by-step solution

Existence of cut-off frequency and photoemission takes place even when intensity is low.

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