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The work function of a surface of a phot...

The work function of a surface of a photosensitive material 6.2eV . The wavelength of the incident radiation for which the stopping potentials is 5V lies in the:

A

Ultraviolet region

B

Visible region

C

Infrared region

D

X-ray region

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Knowledge Check

  • 4 eV is the energy of the incident photon and the work function is 2 eV. The stopping potential will be

    A
    2V
    B
    4V
    C
    6V
    D
    `2 sqrt(2)` V

  • The work function of photometal is 6.626 eV. What is the threshold wavelength ?

    A
    3921 `Å`
    B
    1875 `Å`
    C
    1867 `Å`
    D
    4433 `Å`

  • The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is

    A
    3000 `Å`
    B
    2062.5 `Å`
    C
    4125 `Å`
    D
    6000 `Å`

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