0 votes 0 votes The bandgap in $eV$ of a semiconductor material required to construct an $LED$ that emits peak power at the wavelength of $620\;nm$ is $\_\_\_\_\_\_\_.$ (Plank constant $h=4.13567\times10^{-15}\;eV\;s$ and speed of light $c=2.998\times10^8\;m/s$). Others gate2016-in numerical-answers + – Milicevic3306 asked Mar 26, 2018 • retagged Dec 1, 2020 by soujanyareddy13 Milicevic3306 7.9k points answer See all 0 reply