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Find the band gap energy when a light of wavelength 1240nm is incident on it.

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Find the band gap energy when a light of wavelength 1240nm is incident on it.

(a) 1eV

(b) 2eV

(c) 3eV

(d) 4eV

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This interesting question is from Conductors in division Electric Fields in Material Space of Electromagnetic Theory

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Correct answer is (a) 1eV

The best explanation: The band gap energy in electron volt when wavelength is given is, Eg = 1.24(μm)/λ = 1.24 x 10^-6/1240 x 10^-9 = 1eV.

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