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A p-n photodiode is made of a material w...

A `p-n` photodiode is made of a material with a band gap of `2.0 eV`. The minimum frequency of the radiation that can be absorbed by the material is nearly

A

`1xx10^(14)Hz`

B

`20xx10^(14)Hz`

C

`10xx10^(14)Hz`

D

`5xx10^(14)Hz`

Text Solution

Verified by Experts

The correct Answer is:
D
Frequency corresponding to 2eV is given by
`rArr 2xx1.6xx10^(-19)=66xx10^(-34)xxv`
`v=(3.2xx10^(-19))/(6.6xx10^(-34))=5xx10^(14)Hz`
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