Q. The energy gap of silicon is 1.14 eV. The maximum wavelength at which silicon starts energy absorption, will be($h = 6.62 \times 10^{- 34}\ Js;c = 3 \times 10^{8}ms^{- 1}$)
A) $10.888\ \mathring{\mathrm{A}}$
B) $108.88\ \mathring{\mathrm{A}}$
C) $1088.8\ \mathring{\mathrm{A}}$
D) $10888\ \mathring{\mathrm{A}}$
Explanation
(d) $\lambda = \frac{hc}{E} = \frac{6.62 \times 10^{- 34} \times 3 \times 10^{8}}{(1.14 \times 1.6 \times 10^{- 19})} = 10,888\mathring{\mathrm{A}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.