D1 line | ||||
subject | fact |
D1 line | has wavelength 5896 Å | |
has definition Spectral line of neutral sodium. | ||
is a kind of D line | ||
D line | has species Na I | |
interstellar line | has width narrow | |
has detection procedure narrow absorption lines which don't participate in the periodic Doppler shift of intrinsic absorption lines in a binary star | ||
has equivalent width depends on the amount of absorbing matter between the source and the observer | ||
occurs in O stars | ||
Fraunhofer line | has dicovery date 1814 | |
has discoverer Joseph Fraunhofer | ||
occurs in Sun | ||
absorption line | has antonym emission line | |
spectral line | has transition | |
radiation measurement | has unit radiation unit | |
number | has value |