Question

The energy gap of silicon is 1.14eV. The maximum wavelength at which silicon will begin absorbing energy is –

• A. 10877 Å
• B. 1088.8 Å
• C. 108.88 Å
• D. 10.888 Å

Answer 1

Answer: (A)

10877 Å

Answer 2

l = $\frac{hc}{E}$ = $\frac{12400}{1.41}$Å = 10877 Å