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The work function of a surface of a photosensitive material is . The wavelength of the incident radiation for which the stopping potential is lies in the:

  1. A
    X-ray region
  2. B
    Ultraviolet region
  3. C
    Visible region
  4. D
    Infrared region

Solution & Step-by-step Explanation

Einstein's photoelectric equation:

Where = incident photon energy, , (stopping potential).

Wavelength .The range of Ultraviolet (UV) light is approximately to . Hence, it lies in the UV region.

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The work function of a surface of a photosensitive material is . The wavelength of the incident radiation for which the stopping potential is lies in the:
A
X-ray region
B
Ultraviolet region
C
Visible region
D
Infrared region

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Modern PhysicsPhotoelectric EffectStopping Potential

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