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  4. To detect light of wavelength 500 nm , the photodiode must be fabricated from a semiconductor of minimum bandwidth of

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Q. To detect light of wavelength $500 \, nm$ , the photodiode must be fabricated from a semiconductor of minimum bandwidth of

NTA AbhyasNTA Abhyas 2022

Solution:

Minimum bandwidth $\Delta E$
$\Delta E=\frac{1240 \, eV nm}{500 \, nm}=2.48 \, eV$