What is the wavelength of light (in nanometers, nm) emitted when the electron in a hydrogen atom moves from the n=5 energy level to the n=3 energy level?

Answer 1

1/λ = R(1/n^2 - 1/m^2)
R = 1.1•10^7 m^-1 is the Rydberg constant
n = 3, m = 5
λ= 7.99•10^-8 =79.9 nm