A hydrogen atom initially in its ground state absorbs a photon and the electron is…

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

A hydrogen atom initially in its ground state absorbs a photon and the electron is excited to the

n=3

level. Calculate the kinetic energy (in eV) gained by the hydrogen atom due to recoil. Mass of hydrogen atom

M = 1.67\times10^{-27}\,\text{kg}

h = 6.63\times10^{-34}\,\text{J\,s}

c = 3.00\times10^{8}\,\text{m\,s}^{-1}

, and

1\,\text{eV}=1.60\times10^{-19}\,\text{J}