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Electron, Photon, Photo-electric Effect and X-Rays — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectron, Photon, Photo-electric Effect and X-Rays1 Mark
MCQ
The number of photo-electrons emitted per second from a metal surface increases when
  • A
    The energy of incident photons increases
  • B
    The frequency of incident light increases
  • C
    The wavelength of the incident light increases
  • ✓
    The intensity of the incident light increases
✓

Answer

Correct option: D.
The intensity of the incident light increases
Intensity $\propto$ (No. of photons) $\propto$ (No. of photoelectrons)

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