Paschen series

The Paschen series is hydrogen spectral lines from n greater than 3 to n = 3. Named after Friedrich Paschen. (As opposed to the Lyman series and Balmer series.)

Lines:

• 4 -> 3: 1875 nm
• 5 -> 3: 1282 nm
• 6 -> 3: 1094 nm
• 7 -> 3: 1009 nm
• 8 -> 3: 995 nm
• 9 -> 3: 887 nm
• infinity -> 3: 820 nm

wavelength = RH × ( n-2 - m-2 )

• R_H is the Rydberg constant for hydrogen, 1.09737316 x 10⁷m^-1 = 13.6eV / hc
• m is the former level
• n is the latter level