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Dual Nature of Radiation and Matter
Question
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In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum

  • wavelength

  • frequency

  • amplitude

  • angle of incidence

Answer

B.

frequency

In photoelectric effect for a given photosensitive material, there exists a certain minimum cut-off frequency, called the threshold frequency, below which no emission of photoelectrons takes place no matter how intense the light is.

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