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...

geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed...

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...

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...

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...

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

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

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...

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

solid geometry, it is defined as the union of a line and two half-planes that have this line as a common edge. In higher dimensions, a dihedral angle...

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

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...

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...

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...

following quantities are considered: length, area, volume, plane angle, solid angle, mass, density, time, frequency, velocity, volumetric flow rate, acceleration...

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...

{\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...

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

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...

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...

by a light source that emits one candela of luminous intensity over a solid angle of one steradian. 1   lm = 1   cd × 1   sr {\displaystyle 1\ {\text{lm}}=1\...

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...

\,\mathrm {d} \theta \,\mathrm {d} \varphi ~.} Thus the differential solid angle is d Ω = d S r r 2 = sin ⁡ θ d θ d φ . {\displaystyle \mathrm {d} \Omega...

The radian, denoted by the symbol rad, is the unit of angle in the International System of Units (SI) and is the standard unit of angular measure used...

in Spain by Marcos Fajardo, it was later co-developed by his company Solid Angle SL (now owned by Autodesk) and Sony Pictures Imageworks. Arnold is one...

where Ω is the solid angle of the spherical sector in steradians, the SI unit of solid angle. One steradian is defined as the solid angle subtended by a...

source is the integral of the spectral radiance, B, over the source solid angle: S = ∬ source B ( θ , ϕ ) d Ω . {\displaystyle S=\iint \limits _{\text{source}}B(\theta...