An excited state of H atom emits a photon of wavelength λ and returns in the ground state. The principal quantum number of excited state is given by: An excited state of H atom emits a photon of wavelength λ and returns in the ground state. The principal quantum number of excited state is given by: November 10, 2020 Category: Chapter 2 - Atomic Structure (Level 1 and Level 2) , N Awasthi Physical Chemistry , Facebook Messenger WhatsApp Share this:TwitterFacebook Related