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Q.

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

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a

0.9

b

0.7

c

0.5

d

1.1

answer is C.

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Detailed Solution

1240024800=0.5eV
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The electrical conductivity of a semiconductor increases when electro magnetic radiation of wavelength shorter than 2480 nm is incident on it. The band gap (in eV) for the semiconductor is