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NEET2008PhysicsDual Nature of MatterActual

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

Options

  1. AX-ray region
  2. BUltraviolet region
  3. CVisible region
  4. DInfrared region

Correct answer

B. Ultraviolet region

Step-by-step solution

aligned & eV ₀=E- & E= eV ₀+ & =5 eV +6.2 eV & =11.2 eV & = ( 12400 11.2 ) Å=1000 Å & hence lies in ultraviolet region. & aligned

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