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Q.
The forbidden energy gap in $Ge$ is $0.75\,eV$ , given $hc=11250\,eV\,\mathring{A}$ The maximum wavelength of radiation that will generate electron hole pair is
NTA AbhyasNTA Abhyas 2022
Solution:
Energy gap, $E_{g}=\frac{h c}{\lambda }=\frac{11250}{0 . 75}=15000\,\mathring{A}$