2. a) Rydberg proposed a general formula to calculate various lines in the hydrogen
spectrum.
(i) Write the formula
(ii) Calculate the wavelength of the spectral line when the electron in the hydrogen
atom undergoes transition from the energy level with n=4 to the energy level with n=2

Question

2. a) Rydberg proposed a general formula to calculate various lines in the hydrogen
spectrum.
(i) Write the formula
(ii) Calculate the wavelength of the spectral line when the electron in the hydrogen
atom undergoes transition from the energy level with n=4 to the energy level with n=2

anonymous · Answer

1/lambda = R*z^2*((1/(n1^2) - 1/(n2^2))

anonymous · Answer

R-rydberg constant
n1-lowest value of n 
n2-the other value of n
z=the atomic no.