Calculate the wavelength (in m) of a photon capable of exciting an electron in Li2+ from the state n= 3 to the state n=5
Use the rydberg formula to calculate wavelength
1/lambda = R*Z^2*(1/n_f^2 - 1/n_i^2)
1/lambda = 1.0973*10^7 * 3^2 * (1/(3^2) – 1/(5^2))
Lambda = 1.4239 * 10^-7