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Question
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 600 nm is incident on it. The energy band gap (in eV) for the semiconductor is
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 600 nm is incident on it. The energy band gap (in eV) for the semiconductor is
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Solution
The correct option is B 2.06
Given, λ=600 nm=600×10−19m,
We know that, energy gap =hcλ
=6.62×10−34×3×108600×10−9×1.6×1019=2.06 eV.
Given, λ=600 nm=600×10−19m,
We know that, energy gap =hcλ
=6.62×10−34×3×108600×10−9×1.6×1019=2.06 eV.
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