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The electrons are emitted in the photoel...

The electrons are emitted in the photoelectricm effect from a metal surface

A

Only if the frequency of radiation is above a certain threshold value.

B

Only if the temperature of the surface is high.

C

at a rate that is independent of the nature of metal

D

with a maximum velocity proportional to the frequency of incident radiation.

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The correct Answer is:
A
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Knowledge Check

  • The electrons are emitted in the photoelectric effect from a metal surface

    A
    Only if the frequency of radiation is above a certain threshold value.
    B
    Only if the temperature of the surface is high.
    C
    at a rate that is independent of the nature of metal
    D
    with a maximum velocity proportional to the frequency of incident radiation.

  • Photoelectrons emitted from a metallic surface are

    A
    Present inside the nucleus.
    B
    orbiting very close to nucleus.
    C
    generated by decay of neutrons within the nucleus.
    D
    free to move within interatomic spacing.

  • The number of photoelectrons 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.
    D
    the intensity of the incident light increases.

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