Q. An electron-hole pair is formed when light of maximum wavelength 6000 $\mathring{\mathrm{A}}$ is incident on the semiconductor. What is the band gap energy of the semiconductor? ($h = 6.62\ \times 10^{- 34}$ J-s)
A) 3.31$\ \times 10^{- 19}$ J
B) 3.07 $\times 10^{- 19}$ J
C) 2.07 $\times 10^{- 19}$ J
D) 2.07 J
Explanation
(a) Both energy gap, $E = \frac{hc}{\lambda}$
$= \frac{6.62\ \times 10^{- 34} \times 3\ \times 10^{8}}{6000\ \times 10^{- 10}} = 3.31\ \times 10^{- 19}J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.