Question

Calculate the allowed wavelengths for the emission of a photon initially in the n=3 state in a hydrogen atom

Answer 1

1/lambda= Rh (1/n1-1/n2)
and
1/lambda=Rh(1/n1 -1/n3)
and
1/lambda=Rh(1/n2-1/n3)

Rh=1.097E7

Answer 2

i understand i would use Rydberg formula but what is the values of n