LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colour.[h = 6.63 $\times$ 10$-$34 Js and c = 3 $\times$ 108 ms$-$1]

Question

LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colour.

[h = 6.63 $\times$ 10^$-$34 Js and c = 3 $\times$ 10⁸ ms^$-$1]

654 nm and orange colour

654 nm and red colour

1046 nm and red colour

1046 nm and blue colour

Solution

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