CUET · PHYSICS · PYQ PAPER 2023
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. The band gap for the semiconductor is :
- A 0.5 eV
- B 0.7 eV
- C 0.9 eV
- D 1.1 eV
Answer & Solution
Correct Answer
(A) 0.5 eV
Step-by-step Solution
Detailed explanation
\(E_g = \frac{hc}{\lambda}\) \(E_g = \frac{1240 \text{ eV} \cdot \text{nm}}{2480 \text{ nm}}\) \(E_g = 0.5 \text{ eV}\)
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