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What (who) is penumbra$58964$ - definition
WIKIMEDIA DISAMBIGUATION PAGE
Penumbra (series); Penumbra (company)
Penumbra (medicine)
MEDICAL TERM FOR THE AREA SURROUNDING AN ISCHEMIC EVENT SUCH AS THROMBOTIC OR EMBOLIC STROKE
Ischemic penumbra
In pathology and anatomy the penumbra is the area surrounding an ischemic event such as thrombotic or embolic stroke. Immediately following the event, blood flow and therefore oxygen transport is reduced locally, leading to hypoxia of the cells near the location of the original insult.
Penumbra Theatre Company
AFRICAN-AMERICAN THEATRE COMPANY IN SAINT PAUL, MINNESOTA
Penumbra Theatre; Penumbra Theater; Penumbra Theater Company
The Penumbra Theatre Company, an African-American theatre company in Saint Paul, Minnesota, was founded by Lou Bellamy in 1976. The theater has been recognized for its artistic quality and its role in launching the careers of playwrights including two-time Pulitzer Prize-winner August Wilson.
Umbra, penumbra and antumbra
![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).")
DISTINCT PARTS OF A SHADOW
Penumbra; Antumbra; Soft shadows; Penumbral; Umbra and Penumbra; Umbra; Penumbras; Soft shadow
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.
Wikipedia
Penumbra (disambiguation)
The penumbra is the part of a shadow where the light source is only partially blocked.
Penumbra may also refer to:
