Series Name

Wavelengths (nm)

Frequency (1/ sec)

Confined between orbits

Lyman

91.15-121.54

3.29E+15-2.47E+15

1-2

Balmer

364.61-656.29

8.22E+14-4.57E+14

2-3

Paschen

820.36-1875.12

3.65E+14-1.60E+14

3-5

Brakkett

1458.42-4051.18

2.06E+14-7.40E+13

4-7

Pfund

2278.79-7457.85

1.32E+14-4.02E+13

5-10

Humphreys

3281.45-12368.55

9.14E+13-2.42E+13

6-12