A doped semiconductor has impurity levels 0.01eV above the valence band.
Find maximum wavelength of light which can create a hole in the valence band.

Explanation

Also `E_(g)= (hc)/(lamda) rArr lamda= (hc)/(E_(g)) = (6.62 xx 10^(-34) xx 3 xx 10^(3))/(0.01 xx 16 xx 10^(-19))`
`=1.24 xx 10^(-6)m`