Wavelength for high energy EMR transition in H-atom is 91 nm. What energy is needed for this transition? Wavelength for high energy EMR transition in H-atom is 91 nm. What energy is needed for this transition? November 10, 2020 Category: Chapter 2 - Atomic Structure (Level 1 and Level 2) , N Awasthi Physical Chemistry , Facebook Messenger WhatsApp Share this:TwitterFacebook Related