The wavelength of the first line of Balmer series is 6563 Ao. The wavelength of the first line of Lyman series is

For first line of Balmer series.1λ=R122−132or     1λ=R14−19or     1λ=R9−436=5R36                  λ=365Rfor first line Lyman series 1λ'=R112−1221λ'=R1−141λ'=3R4      or     λ'=43Ror       λ'λ=43R×5R36=20108λ'=20108×6563 Ao   =1215 Ao