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AP EAMCET20226 Jul 2022Morning ShiftPhysicsSemiconductorsActual

The energy of a photon in a monochromatic light of wavelength 621 ~nm matches with the band gap of a semiconducting material. Then the minimum energy required to create an electron-hole pair from the semiconductor is [Take hc =1242 eV - nm , where h is Planck's constant and c is speed of light in vacuum]

Options

  1. A3.4 eV
  2. B1.7 eV
  3. C2 eV
  4. D2.2 eV

Correct answer

C. 2 eV

Step-by-step solution

Minimum energy required = 1242 621 eV =2 eV

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