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A p-n photodiode is fabricated from a se...

A `p-n` photodiode is fabricated from a semiconductor with a band gap of `2.5 eV`. It can detect a signal of wavelength

A

`6000Å`

B

`4000` nm

C

`6000` nm

D

`4000Å`

Text Solution

Verified by Experts

The correct Answer is:
D
`lambda=(hc)/(E_(g))=(12400)/(2.5)=4960Å`
`:. 4000 Ålt4960 Å`
`:.` It can be detected by photo diode .
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