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O que (quem) é Umbra - definição
DISTINCT PARTS OF A SHADOW
Penumbra; Antumbra; Soft shadows; Penumbral; Umbra and Penumbra; Umbra; Penumbras; Soft shadow
![Scale diagram of [[Earth's shadow]], showing how the umbral cone extends beyond the [[orbit of the Moon]] (the Moon is indicated by the yellow dot).](https://commons.wikimedia.org/wiki/Special:FilePath/Earth umbral cone (partial).png?width=200 "Scale diagram of [[Earth's shadow]], showing how the umbral cone extends beyond the [[orbit of the Moon]] (the Moon is indicated by the yellow dot).")
Umbra
·noun The central dark portion, or nucleus, of a sun spot.
II. Umbra ·noun The fainter part of a sun spot;
- now more commonly called penumbra.
III. Umbra ·noun Any one of several species of sciaenoid food fishes of the genus Umbrina, especially the Mediterranean species (U. cirrhosa), which is highly esteemed as a market fish;
- called also ombre, and umbrine.
IV. Umbra ·noun The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk;
- used in contradistinction from penumbra. ·see Penumbra.
umbra
['?mbr?]
¦ noun (plural umbras or umbrae -bri:)
1. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing totality in an eclipse.
2. Astronomy the dark central part of a sunspot.
Derivatives
umbral adjective
Origin
C16 (denoting a ghost): from L., lit. 'shade'.
umbra
n.
[L.] Shade.
Wikipédia
Umbra, penumbra and antumbra
The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object. Assuming no diffraction, for a collimated beam (such as a point source) of light, only the umbra is cast.
These names are most often used for the shadows cast by celestial bodies, though they are sometimes used to describe levels, such as in sunspots.
Exemplos do corpo de texto para Umbra
1. But her distraught uncle, Mushtaq Mir, identified her as Umbra and said she was in the building at the time.
2. The military also recovered a purported letter of a councilman in Jolo dated July 17, 2006 and addressed to Umbra Jumdail, a senior Abu Sayyaf leader.
3. The alleged MILF shooter has been an active sub–commander of MILF 105th Base Command Ameril Umbra Kato, the military claimed.
4. Government Press Secretary Jesus Dureza said the front should hand over Abdullah Macapaar, also known as Bravo, and Ameril Umbra Kato.
5. Its Latin root, umbra, means "shade." ' If you live in the north, you‘ve probably seen these sticking out of windows on hot summer days.