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JEE Main20249 Apr 2024Morning ShiftPhysicsSemiconductorsActual

A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42 eV . The wavelength of light emitted from the LED is :

Options

  1. A1400 ~nm
  2. B650 ~nm
  3. C875 ~nm
  4. D1243 ~nm

Correct answer

C. 875 ~nm

Step-by-step solution

= 1240 1.42 =875 ~nm (Approx)

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