Question

calculate the wavelength in micrometers for the band gap energy of 2ev

Answer 1

Explanation:

E = hv

2×1.6×10^-19= [(6.626×10-34)×(3×10^8)]/ λ

λ = 19.878×10^-26/3.2×10^-19

λ = 6.21×10^-7

λ = 0.621μm