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What should be the band gap of the semiconductors to be used as LED?

(a) 0.5 eV

(b) 1 eV

(c) 1.5 eV

(d) 1.8 eV

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Correct choice is (d) 1.8 eV

For explanation: Semiconductors with band gap close to 1.8 eV are ideal materials for LED. They are made with semiconductors like GaAs, GaAsP etc.

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