A collection of atoms has 20% of the sample in a state 4.7 eV above the ground state. If these emit coherent radiation, what is the wavelength of the laser light produced in nanometers? Please give your answer with no decimal places. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)

A collection of atoms has 20% of the sample in a state 4.7 eV above the ground state. If these emit coherent radiation, what is the wavelength of the laser light produced in nanometers? Please give your answer with no decimal places. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)