# solid angle

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## solid angle

n.
An angle having a value equal to the area on a sphere subtended by a surface, divided by the square of the radius of that sphere. Solid angles are measured in steradians.

## solid angle

n
(Mathematics) a geometric surface consisting of lines originating from a common point (the vertex) and passing through a closed curve or polygon: measured in steradians
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## sol′id an′gle

n.
an angle formed by three or more planes intersecting in a common point or formed at the vertex of a cone.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 solid angle - an angle formed by three or more planes intersecting at a common point (the vertex)angle - the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
In the case where an isotropic radiating axial point source is in the detector well-cavity at a distance, h, from cavity bottom (see Figure 1), the path of the photon is well defined by the geometrical solid angle, [OMEGA], subtended by the source-to-detector system at the point of entry.
TRUE SELF (2.10) looks another solid angle on that card with Danny Mullins on board as Willie's beast aims for a four-timer.
The activity of the source is 106 neutrons/s, emitted in the full solid angle [7].
There it is necessary to record reliable P- and S-wave amplitudes on as many receivers as possible to achieve as large as possible solid angle (an angle given by the aperture of receiver array, as viewed from the source location) resulting in a stable source mechanism inversion.
In this paper it is argued that the usually isotropic Unruh radiation seen by the orbiting muon is blocked by the central proton, which subtends a much larger solid angle at the close-orbiting muon than at the distantly-orbiting electron.
where [P.sub.i] is the incident power measured by the detector when no sample is present and [P.sub.s] is the power scattered from the area of the sample included in the detector field of view at angles within the solid angle defined by [OMEGA] = A/[R.sup.2].
If the candlepower is unchanged, the only way total lumen output can go up is if the illuminated solid angle becomes larger.
(NASDAQ: ADSK) has acquired 3D animation software provider Solid Angle, for an undisclosed amount, the company said.
M2 EQUITYBITES-April 19, 2016-Autodesk Buys 3D Animation Software Firm Solid Angle
Here the quantity c([[xi].sup.0]) is the interior solid angle of S at [[xi].sup.0] [member of] s and (1 - c([[xi].sup.0])) is the outer solid angle at the same point.
The helix antenna provides AR of nearly unity over the whole 47 steradian solid angle except at and around nulls, and to the best knowledge of authors this antenna provides maximum solid angle polarization beamwidth (for AR [less than or equal to] 3 dB) in the class of omnidirectional resonant antennas in elevation plane at any azimuth angle.

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