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Calculate the wavelength of radiation emitted by an LED made up of a semiconducting material with band gap energy 2.8eV.(a) 2.8 Å(b) 4.3308 Å(c) 5548.4 Å(d) 4430.8 Å |
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Answer» The correct option is (d) 4430.8 Å For explanation: E = hc/ʎ Therefore, ʎ = hc/E ʎ = 4430.8 Å. |
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