What is the energy of photon whose wavelength is 6840 Å ? What is the energy of photon whose wavelength is 6840 Å ? November 28, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions , Chapter 29 - Dual Nature of Matter and Radiation , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related