Q. For germanium crystal, the forbidden energy gap in joules is
A) $1.12 \times 10^{- 19}$
B) $1.76 \times 10^{- 19}$
C) $1.6 \times 10^{- 19}$
D) Zero
Explanation
(a) For $Ge,\ E_{g} = 0.7\ eV = 0.7 \times 1.6 \times 10^{- 19}J = 1.12 \times 10^{- 19}J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.