SOLID ANGLE Definition & Meaning

solid angle

noun

Geometry.

an angle formed by three or more planes intersecting in a common point or formed at the vertex of a cone.

solid angle

noun

a geometric surface consisting of lines originating from a common point (the vertex) and passing through a closed curve or polygon: measured in steradians

solid angle

A three-dimensional angle, formed by three or more planes intersecting at a common point. Its magnitude is measured in steradians, a unitless measure. The corner of a room forms a solid angle, as does the apex of a cone; one can imagine an indefinite number of planes forming the smooth round surface of the cone all intersecting at the apex. Solid angles are commonly used in photometry.

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�y��vlog History and Origins

Origin of solid angle¹

First recorded in 1695–1705

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Example Sentences

Examples have not been reviewed.

For the record, the amount of extra light they found bouncing around the universe is about 10 nanowatts per square meter per steradian, a measure of solid angle on the sky.

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The combination of the subdetectors provides particle energy and momentum measurements, together with electron, muon, and photon identification, over more than 98% of the solid angle.

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The miniature solid angle also recurs in the central quartering.

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Six of these squares joined together formed eight solid angles, each produced by three plane right angles: and the shape of the body thus formed was cubical, having six square planes for its surfaces.”

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Replacing by single planes or groups of planes all the similar edges or solid angles of a figure called the “primitive form” he derived other related forms.

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