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An LED is constructed from a p-n junctio...

An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then, the wavelength of the emitted light is

A

`6.5xx10^(-7)m`

B

`2.9xx 10^(-9)m`

C

`9.1 xx 10^(-5) m`

D

`1.6xx 10^(-8)m`

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The correct Answer is:
A
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