Rydberg Formula (Formula (6))

This paper (Formula (10))

Remark

${\lambda }_{2,1}$

121.502 nm

121.506 nm

Lyman α

${\lambda }_{3,1}$

1.02518 nm

1.02547 nm

Lyman β

${\lambda }_{3,2}$

656.112 nm

656.123 nm

${\lambda }_{4,2}$

486.009 nm

486.015 nm