Penumbra Definition & Meaning - Merriam-Webster
Web1. a. : a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light. b. : a shaded region surrounding the dark central portion of a sunspot. 2. : a surrounding or adjoining region in which …
Umbra, penumbra and antumbra - Wikipedia
WebUmbra, penumbra, and antumbra formed through windows and shutters. The umbra (Latin for "shadow") is the innermost and darkest part of a shadow, where the light source is completely blocked by the occluding body. An observer within the …
PENUMBRA Definition & Meaning | Dictionary.com
WebPenumbra definition: the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off.. See examples of PENUMBRA used in a sentence.
Eclipse Shadow: What Is the Penumbra? - timeanddate.com
WebThe penumbra is a half-shadow that occurs when a light source is only partly covered by an object—for example, when the Moon obscures part of the Sun's disk. The other 2 areas are: Umbra – the shadow's dark center portion. Antumbra – the lighter part of the shadow that begins where the umbra tapers to a point.
PENUMBRA | English meaning - Cambridge Dictionary
Webnoun [ C or U ] physics specialized uk / pɪˈnʌm.brə / us / pɪˈnʌm.brə / Add to word list. a part of a shadow in which only some of the light is blocked, used especially about a shadow …
penumbra noun - Definition, pictures, pronunciation and usage …
WebDefinition of penumbra noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Penumbra - Definition, Meaning & Synonyms | Vocabulary.com
WebSun spots also have a penumbra, the outer edge that's not quite as dark as the center. The word comes from the Latin root umbra, which means "shadow." The pen part means …
penumbra, n. meanings, etymology and more - Oxford English …
WebThe partially shaded region around the shadow of an opaque body, when the light source is larger than a point source and only part of its light is cut off (contrasted with the full shadow or umbra); ( esp. in Astronomy) that of the shadow cast by the moon on the earth in a solar eclipse, or by the earth on the moon in a lunar eclipse, resulting ...
PENUMBRAL Definition & Meaning | Dictionary.com
WebPenumbral definition: of, causing, or being the partial shadow outside the complete shadow of an opaque body, such as a planet, where the light from the source of illumination is only partly cut off. See examples of PENUMBRAL used in a sentence.
Penumbra | Moon, Sun & Shadow | Britannica
Webpenumbra, (from Latin paene, “almost”; umbra, “shadow”), in astronomy, the outer part of a conical shadow cast by a celestial body, in which the light from the source is partially blocked—as compared to the umbra (q.v.), the shadow’s darkest, central part, where the light is totally excluded.
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