1. The problem statement, all variables and given/known data A line of wavelength 1093 nm is observed in the hydrogen spectrum. Identify the transition that leads to this line. 2. Relevant equations where n refers to the upper state and n' to the lower state. 1/lamda = R (1/n' - 1/n) -----1 Ei - Ef = hc/lamda ------2 3. The attempt at a solution i am not very sure with my answer... please help along thanks. basically i see this as a simultaneous equation with two unknown. i put lambda = 1093nm in equation 1 hence i get, 0.083401374 = 1/n' - 1/n -------3 this is the part i am not so sure. using the equation 2. Ei - Ef = hc/lamda (- 13.606ev / n ' ) - (- 13.606ev / n ) = hc/1093nm 13.606 ev (1/n' - 1/n) = 1.81855 x 10^-19 ------4 If i put eq 3, 1/n' = 0.083401374 + 1/n into eq 4 it will become zero. Where did i go wrong?