Physics - Semiconductors Question with Solution | TestHub

If a semiconductor photo diode can detect a photon with a maximum wavelength of$400 \mathrm{nm}$, then its band gap energy is: Planck's constant$\mathrm{h}=6.63\times {10}^{-34} \mathrm{J}.\mathrm{s}$
Speed of light$\mathrm{c}=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$