A moving hydrogen atom makes a head  on collision with a stationary hydrogen atom.
Channel: Doubtnut
Date: 05/07/2020

A moving hydrogen atom makes a head  on collision with a stationary hydrogen atom. Befor collision both atoms are in in ground state and after collision they move together. What is the minimum value of the kinetic  energy of the moving hydrogen atom, such that one of the atoms reaches one of the excited state?