Teaching HTET PGT Level 3 - 2024 Mock Test Physics Semiconductors The Light-Emitting Diode (LED)

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:

1
650 nm
2
1243 nm
3
875 nm
4
1400 nm
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