An Etymological Dictionary of Astronomy and Astrophysics

1 terms — P › PF

P PA PE PF PG PH PI PL PO PR PS PT PU PY

Pfund series   سری ِ پفوند   seri-ye Pfund Fr.: série de Pfund 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.