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The electrical conductivity of a semicon...

The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than `2480 nm` is incident on it. The band gap in `(eV)` for the semiconductor is.

A

0.9

B

0.7

C

0.5

D

1.1

Text Solution

Verified by Experts

The correct Answer is:
C
`E_g=(hc)/lambda=(1240 eV nm)/(2480 nm)=0.5 eV`
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