What is the wavelength  of light emitted  when  the electron of a  hydrogen  atom  undergoe
Channel: Doubtnut
Date: 2020-07-26

What is the wavelength  of light emitted  when  the electron of a  hydrogen  atom  undergoes  a transition  from an energy level  with `n= 4` to an energy  level  with `n = 2`? .What is the  colour  corresponding  to this  wavelength ?