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Q.

An LED is constructed from a p-n junction diode using GaAsP. The energy gap is 1.9 eV. The wavelength of the light emitted will be equal to

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a

10.4 × 10^–26 m

b

654 nm

c

654A⁰

d

654 × 10^–11 m

answer is B.

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Detailed Solution

$λ = \frac{12400}{1.9} A^{0} = 654 n m$

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