Q. An optical pulse containing 6 × 106 photons is incident on a photodiode and 4.5 × 106 electron-hole pairs are created. The maximum possible quantum efficiency (in %) of the photodiode is
Ans: 75
Sol:
Number of incident photons ′N′=6×106
Number of electron-hole pairs generated
n=4.5×106
Quantum efficiency of photo-diode
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