Physics

Problem

If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is: Planck's constant,

h = 6.63 \times 10^{-34}

J.s. Speed of light,

c = 3 \times 10^8

m/s a. 1.1 eV b. 2.0 eV c. 1.5 eV d. 3.1 eV