An electron of energy 20 eV collides with a hydrogen atom in the ground state. As a result of the collision, the atom is excited to a higher energy state and the electron is scattered with reduced velocity. An electron of energy 20 eV collides with a hydrogen atom in the ground state. As a result of the collision the atom is excited to a higher energy state and the electron is scattered with reduced velocity. September 11, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related