An Etymological Dictionary of Astronomy and Astrophysics

A series of lines in the infrared spectrum of atomic hydrogen whose representing transitions between the fifth energy level and higher levels.

Etymology (EN): After August Herman Pfund (1879-1949), an American physicist and spectroscopist; → series.

A series of lines in the infrared spectrum of atomic hydrogen whose representing transitions between the fifth energy level and higher levels.

Etymology (EN): After August Herman Pfund (1879-1949), an American physicist and spectroscopist; → series.