Question

The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than `2480 nm` is incident on it. The band gap in `(eV)` for the semiconductor is.
A. 0.9
B. 0.7
C. 0.5
D. 1.1

Answer 1

Correct Answer - C
`E_g=(hc)/lambda=(1240 eV nm)/(2480 nm)=0.5 eV`