Semiconductor Devices And Logic Gates

A p-n junction photodiode is fabricated from a semiconductor with a band gap of \(2.5 \mathrm{~eV}\). It can detect a signal of wavelength
[Planck's constant \(=6.6 \times 10^{-34} \mathrm{Js}, \mathrm{c}=3 \times 10^8 \mathrm{~m} / \mathrm{s}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}\)]