What is the wavelength of the emitted photon, when the electron in the hydrogen atom makes a transition from the ni = 5 state to the nf = 3 state?

Answer 1

(1/wavelength) = R(1/3^2 - 1/5^2)
R = Rydberg constant.

Answer 2

is the answer 780373.3333

Answer 3

No but I think it's close to the reciprocal of that number.
1/wavelength = 0.07111(R)