Physics - Semiconductors Question with Solution | TestHub

LED is constructed from$Ga-As-P$semiconducting material. The energy gap of this LED is$1.9 \mathrm{eV}$. Calculate the wavelength of light emitted and its colour.$h=6.63\times {10}^{-34} \mathrm{J}-\mathrm{s}$and$c=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$