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Chemistry

NEET ChemistryClass 11Photoelectric effectMediumStatement based

Question 8 of 10

Light of different frequencies and intensities falls on a clean metal surface. Which of the statements about the photoelectric effect are correct?

  • Statement I: Increasing the intensity of light of a fixed frequency increases the kinetic energy of the ejected electrons.
  • Statement II: Light below the threshold frequency ejects no electrons, however intense it is.
  • Statement III: Above the threshold frequency, the number of electrons ejected per second rises with the intensity of light.
  • Statement IV: Electrons are ejected as soon as suitable light strikes the metal, with no measurable time lag.

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