1.

Conductivity of a semiconuctor increases when a radiation of wavelength is less than `2480 nm` is incident on it. The forbidden gap isA. `0.5 J`B. `0.5 eV`C. `1 eV`D. `2 eV`

Answer» Correct Answer - B
`"energy"=[(12400)/(lambda "in" A^(@))]eV`


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