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Suppose the energy liberated in the in t...

Suppose the energy liberated in the in the recombination of a hole-electron pair is converted into electromagnetic radiation.If the maximum wavelength emmited is 820nm,What is the band gap?

A

0.5 e V

B

2.5 e V

C

1.5 e V

D

15 e V

Text Solution

Verified by Experts

The correct Answer is:
C
Give `lambda = 820mn`
`E = (hc)/(lambda) = (1242/(820)( eV-nm)/nm`
` = 1.5eV`
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