In geometry, a solid angle (symbol: Ω) is a measure of the amount of the field of view from some particular point that a given object covers. That is...

The contact angle (symbol θC) is the angle between a liquid surface and a solid surface where they meet. More specifically, it is the angle between the...

analog of a plane angle is a solid angle. The solid angle, Ω, at the vertex of a Platonic solid is given in terms of the dihedral angle by Ω = q θ − ( q...

Irrational angle Phase (waves) Protractor Solid angle Spherical angle Subtended angle Tangential angle Transcendent angle Trisection Zenith angle This approach...

they are ranked by the solid angle that they subtend in the sky, measured in square degrees and millisteradians. These solid angles depend on arbitrary boundaries...

the solid angle the source subtends as seen from the pupil. These definitions must be applied for infinitesimally small "elements" of area and solid angle...

angle, formed by the two radii between the center of the sphere and each of the two arc endpoints. More generally, a surface subtends a solid angle if...

The steradian (symbol: sr) or square radian is the unit of solid angle in the International System of Units (SI). It is used in three-dimensional geometry...

luminous intensity uniformly across a solid angle of one steradian, the total luminous flux emitted into that angle is one lumen (1 cd·1 sr = 1 lm). Alternatively...

from, or is reflected from a particular area, and falls within a given solid angle. The procedure for conversion from spectral radiance to luminance is...

emission angle, the solid angle, subtended by surface visible to the viewer, is reduced by the very same amount. Because the ratio between power and solid angle...

wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity...

radius. Basic topics in solid geometry and stereometry include: incidence of planes and lines dihedral angle and solid angle the cube, cuboid, parallelepiped...

emitted, reflected, transmitted or received by a given surface, per unit solid angle per unit projected area. Radiance is used to characterize diffuse emission...

the radiant flux emitted, reflected, transmitted or received, per unit solid angle, and spectral intensity is the radiant intensity per unit frequency or...

is a right angle. Two application examples in which the right angle and the Thales' theorem are included (see animations). The solid angle subtended by...

Luminance, the original meaning of brightness, is the amount of light per solid angle coming from an area, such as the sky. The table below shows the standard...

International System of Units (SI). It measures luminous power per unit solid angle emitted by a light source in a particular direction. Luminous intensity...

ligand cone angle (θ) is a measure of the steric bulk of a ligand in a transition metal coordination complex. It is defined as the solid angle formed with...

which simply calculates the ratio of the beam solid angle to the solid angle of a sphere. The beam solid angle can be approximated for antennas with one narrow...

polar angle may be called inclination angle, zenith angle, normal angle, or the colatitude. The user may choose to replace the inclination angle by its...

{\displaystyle L} over the solid angle Ω {\displaystyle \Omega } for all azimuthal angle (0 to 2 π {\displaystyle 2\pi } ) and polar angle θ {\displaystyle \theta...

refers to the multiplicity (number of microstates) in a system. The solid angle or the rate of precession in a gyroscope In particle physics to represent...

solid angles subtended by the faces are equal, having a common value of π sr, and at which the angles subtended by opposite edges are equal. A solid angle...

tilted at an angle to a source, the illumination provided on the surface is reduced because the tilted surface subtends a smaller solid angle from the source...

given moment. In the case of optical instruments or sensors, it is a solid angle through which a detector is sensitive to electromagnetic radiation. It...

body, Bν, describes the spectral emissive power per unit area, per unit solid angle and per unit frequency for particular radiation frequencies. The relationship...

A square degree (deg2) is a non-SI unit measure of solid angle. Other denotations include sq. deg. and (°)2. Just as degrees are used to measure parts...

internal angle at that vertex, so each vertex of the rectangular solid is associated with an interior angle of 3 × 90° = 270° and an exterior angle of 360°...

A dihedral angle is the angle between two intersecting planes or half-planes. It is a plane angle formed on a third plane, perpendicular to the line of...