When an electron jumps from a higher energy state to a lower energy state with an energy difference

Question

When an electron jumps from a higher energy state to a lower energy state with an energy difference of E electron volt, then the wavelength of the line emitted is given approximately by\

Professor PC Thomas Classes · Answer

$\lambda=\frac{	ext { hc }}{(\Delta 	ext { EineV }) 	imes 1.6 	imes 10^{-19}}$\ $=\frac{12.4}{\Delta E} 	imes 10^{-7}$ mnearly .