A particular atom has its ground state at

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

Problem

-4.00\,\text{eV}

. The atom is excited to a level

4.00\,\text{eV}

above the ground state and then returns to the ground in two sequential emissions. The first photon emitted has a wavelength of

500\,\text{nm}

. Use

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

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

, and

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

. Determine the wavelength of the second photon.