Scheiner speed en · NOUN
Etymology
The system was devised by the German astronomer Julius Scheiner in 1894.
Meanings
- The speed (expressed in degrees) of a plate used for astronomical photography, rated by the least exposure required to produce a visible darkening upon development.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| Scheiner speeds | Number=Plur | lexicographic |