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Debanjana Adhikari posted an Question
April 19, 2020 • 04:03 am 30 points
  • CSIR NET
  • Physical Sciences

Q49. the active medium in a blue led (light emitting diode) is a ga,nn alloy. the band gaps of gan and inn are 3.5ev and 1.5ev respectively. if the band gap of

Q49. The active medium in a blue LED (light emitting diode) is a Ga,nN alloy. The band gaps of GaN and InN are 3.5eV and 1.5eV respectively. If the band gap of Ga,ln_,N varies approximately linearly with x, the value of x required for the emission of blue light of wavelength 400 nm is (take hc 1200eV-nm) (a) 0.95 (b) 0.75 (c) 0.50 (d) 0.33

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