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2. Luminance - Wikipedia

   en.wikipedia.org/wiki/Luminance

   A tea light-type candle, imaged with a luminance camera; false colors indicate luminance levels per the bar on the right (cd/m 2). Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. [1]

3. List of ISO standards 2000–2999 - Wikipedia

   en.wikipedia.org/wiki/List_of_ISO_standards_2000...

   ISO 2440:2019 Flexible and rigid cellular polymeric materials — Accelerated ageing tests; ISO 2441:1975 Pipeline flanges for general use — Shapes and dimensions of pressure-tight surfaces [Withdrawn: replaced with ISO 7005-(1-3)] ISO 2443:1980 Vines — Root stock, cuttings, scions and plants — Specification [Withdrawn without replacement]

4. Lambert's cosine law - Wikipedia

   en.wikipedia.org/wiki/Lambert's_cosine_law

   In optics, Lambert's cosine law says that the observed radiant intensity or luminous intensity from an ideal diffusely reflecting surface or ideal diffuse radiator is directly proportional to the cosine of the angle θ between the observer's line of sight and the surface normal; I = I 0 cos θ.

5. Radiant intensity - Wikipedia

   en.wikipedia.org/wiki/Radiant_intensity

   Radiant intensity is used to characterize the emission of radiation by an antenna: [2], = (), where E e is the irradiance of the antenna;; r is the distance from the antenna.; Unlike power density, radiant intensity does not depend on distance: because radiant intensity is defined as the power through a solid angle, the decreasing power density over distance due to the inverse-square law is ...

6. Radiance (software) - Wikipedia

   en.wikipedia.org/wiki/Radiance_(software)

   Radiance is a suite of tools for performing lighting simulation originally written by Greg Ward. [1] It includes a renderer as well as many other tools for measuring the simulated light levels. It uses ray tracing to perform all lighting calculations, accelerated by the use of an octree data structure.

7. Radiance - Wikipedia

   en.wikipedia.org/wiki/Radiance

   Radiance is used to characterize diffuse emission and reflection of electromagnetic radiation, and to quantify emission of neutrinos and other particles. The SI unit of radiance is the watt per steradian per square metre (W·sr −1 ·m −2). It is a directional quantity: the radiance of a surface depends on the direction from which it is ...