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KCET2010PhysicsSemiconductors

The forbidden energy gap in Ge is 0.72 eV , Given, hc =12400 eV -Å . The maximum wavelength of radiation that will generate electron hole pair is

Options

  1. A172220 Å
  2. B172.2 Å
  3. C17222 Å
  4. D1722 Å

Correct answer

C. 17222 Å

Step-by-step solution

Energy gap, E _ g = hc = hc E _ g = 12400 0.72 =17222 Å

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