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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 semi-conductor is

A

0.5

B

0.7

C

1.1

D

2.5

Text Solution

Verified by Experts

The correct Answer is:
A
Band gap = energy of photon
`=(hc)/lamda=(6.62xx10^(-34)xx10^8)/(2480xx10^(-9)xx1.6xx10^(-9))~~0.5eV`
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