Radiogolven uit het wereldruim: II. Herkomst der radiogolven; Radiogolven uit het wereldruim: II. Herkomst der radiogolven; Radio waves from space.
Abstract
Radio waves, received from any celestial object -- they being the far infra red portion of its spectrum -- deserve attention. The 21.2 cm line due to transitions between hyperfine structure components of the hydrogen ground level, might be observaabe if the lifetime of the upper level does not exceed 4.10^8 year, which, however is improbable. [partial summary]
- Publication:
-
Nederlandsch Tijdschrift voor Natuurkunde
- Pub Date:
- 1945
- Bibcode:
- 1945NTvN...11..210V
- Keywords:
-
- 21-cm line;
- hydrogen;
- radio recombination lines