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The electrical conductivity of a semicon...

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

A

1.1eV

B

2.5eV

C

0.5 eV

D

0.7 eV

Text Solution

Verified by Experts

The correct Answer is:
C
Energy `=12400/(lambda("in" Å)) =12400/24800=0.5 eV`
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