Subject |
has discoverer |
has lower energy level |
has specie |
has upper energy level |
has definition |
has dicovery date |
occurs in |
has series limit |
is a kind of |
has wavelength |
is an instance of |
has antonym |
Balmer line | | 2 | hydrogen (H I) | | The series lies in the visible portion of the spectrum. (Deuterium Hα is 1.785 Å short-ward of hydrogen Hα) | | | 3647 Å | hydrogen line | | | |
Fraunhofer line | Joseph Fraunhofer | | | | Absorption line in the spectrum of the Sun, studied by Fraunhofer in 1814. The nine most prominent he labeled with capital letters (from the red end) A. B. C. D. E. F. G. H. and K. The A band and B band are now known to be groups of telluric lines due to O2 absorption in Earth's atmosphere, and C and F are respectively known as Hα and Hβ. | 1814 | Sun | | absorption line | | | emission line |
spectral line | | | | | A line corresponding to an image of the entrance slit of the spectrometer, seen when light is either emitted by or interrupted by a hot rarefied gas such as hydrogen. The pattern is characteristic of the gas and the wavelength at which the features are observed to occur is indicative of the velocity of the object. | | | | spectral feature | | | |
H alpha | Joseph Fraunhofer | 2 | | 3 | | 1814 | Sun | 3647 Å | | 6563 Å | Balmer line | emission line |