A Bohr hydrogen atom at rest in free space undergoes a

Last updated: 6/8/2023

A Bohr hydrogen atom at rest in free space undergoes a transition from the energy level n 2 to n 1 emitting a photon in the positive x direction Since this photon has momentum the atom must recoil in the negative x direction Find the recoil velocity of the atom A 125 cm sec C 225 cm sec B 325 cm sec D 425 cm sec