| 单词 |
photovisual magnitude |
| 释义 |
photovisual magnitude photovisual magnitude (foh-toh-vizh -û-ăl) See magnitude.photovisual magnitude[¦fōd·ō′vizh·ə·wəl ′mag·nə‚tüd] (astronomy) The magnitude of a star, obtained by measuring the size of the star's image on an isochromatic photographic emulsion, using a filter transmitting only the longer wavelengths between 500 and 600 nanometers; nearly identical with visual magnitude. |
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