PhysicsHard145×since 2002Q6608Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm660 \mathrm{~nm}660 nm. The band gap of photodiode is found to be (X8)eV\left(\frac{\mathrm{X}}{8}\right) \mathrm{eV}(8X)eV. The value of X\mathrm{X}X is : (Given, h=6.6×10−34Js,e=1.6×10−19C\mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}, \mathrm{e}=1.6 \times 10^{-19} \mathrm{C}h=6.6×10−34Js,e=1.6×10−19C )A11B13C15D21Check answerSkip