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Overview

A shadow is a dark area where light from a light source is blocked by an object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light. Point and non-point light sources A point source of light casts only a simple shadow, called an "umbra". For a non-point or "extended" source of light, the shadow is divided into the umbra, penumbra, and antumbra. The wider the light source, the more blurred the shadow becomes. If two penumbras overlap, the shadows appear to attract and merge. This is known as the shadow blister effect. The outlines of the shadow zones can be found by tracing the rays of light emitted by the outermost regions of the extended light source. The umbra region does not receive any direct light from any part of the light source and is the darkest. A viewer located in the umbra region cannot directly see any part of the light source.

From Wikipedia (CC BY-SA 4.0).

Notable quotes

“Shadows are like plants. They need sunlight simply to exist.”
— Thomas M. Disch, The Shadow, in David G. Hartwell (ed.) Year's Best Fantasy 2, p. 334 (Originally published in The Magazine of Fantasy & Science Fiction December, 2001)
“There are no shadows in the dark. Shadows are the servants of light, the children of fire. The brightest flame casts the darkest shadows.”
— in A Clash of Kings by George R. R. Martin, Chapter Davos (II).
“The worthy gentleman [Mr. Coombe], who has been snatched from us at the moment of the election, and in the middle of the contest, while his desires were as warm, and his hopes as eager as ours, has feelingly told us, what shadows we are, and what shadows we pursue.”
— Edmund Burke, speech at Bristol on Declining the Poll.
“Shadows are in reality, when the sun is shining, the most conspicuous thing in a landscape, next to the highest lights.”
— John Ruskin, Painting.
“No matter how satisfying the shade is, one must step out of it. Because if you keep staying in the shade like this, even your own shadow will abandon you.”
— Sanu Sharma, Differences
“Majoresque cadunt altis de montibus umbræ.”
— And the greater shadows fall from the lofty mountains.

Quotes via Wikiquote (CC BY-SA), each with its original source.

Notable quotes

“Shadows are like plants. They need sunlight simply to exist.”
— Thomas M. Disch, The Shadow, in David G. Hartwell (ed.) Year's Best Fantasy 2, p. 334 (Originally published in The Magazine of Fantasy & Science Fiction December, 2001)
“There are no shadows in the dark. Shadows are the servants of light, the children of fire. The brightest flame casts the darkest shadows.”
— in A Clash of Kings by George R. R. Martin, Chapter Davos (II).
“The worthy gentleman [Mr. Coombe], who has been snatched from us at the moment of the election, and in the middle of the contest, while his desires were as warm, and his hopes as eager as ours, has feelingly told us, what shadows we are, and what shadows we pursue.”
— Edmund Burke, speech at Bristol on Declining the Poll.
“Shadows are in reality, when the sun is shining, the most conspicuous thing in a landscape, next to the highest lights.”
— John Ruskin, Painting.
“No matter how satisfying the shade is, one must step out of it. Because if you keep staying in the shade like this, even your own shadow will abandon you.”
— Sanu Sharma, Differences
“Majoresque cadunt altis de montibus umbræ.”
— And the greater shadows fall from the lofty mountains.

Quotes via Wikiquote (CC BY-SA), each with its original source.

Overview

From Wikipedia (CC BY-SA 4.0).

shadow

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shadow

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shadow across IJR

Overview

Notable quotes

Notable quotes

Overview

shadow across IJR