Question

An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let ${\lambda }_n, {\lambda }_g$ be the de Broglie wavelength of the electron in the n^th state and the ground  tate respectively. Let ${\Lambda }_n$ be the wavelength of the emitted photon in the transition from the n^th state to the ground state. For large n, (A, B are constants)