What is the word radiance mean?
Definition of radiance 1 : the quality or state of being radiant. 2 : a deep pink. 3 : the flux density of radiant energy per unit solid angle and per unit projected area of radiating surface.
What is spectral radiance measured in?
Watt/square meter nanometer
2 SPECTRAL IRRADIANCE. This is a measure of radiant flux at particular wavelength incident on per unit area. The SI units for spectral radiance is Watt/square meter nanometer (Watt/m2 nm).
What is photon radiance?
• Photon radiance L. q. • The photon flux emitted or absorbed by a surface, per unit solid angle, per unit projected. area.
What is radiance factor?
Radiance factor is the ratio of the “brightness” from Mars to the “brightness” from a perfect Lambert reflector at Mars’ distance viewed at 0° phase angle (Hapke, 1981; Roush et al., 1992).
What word class is radiance?
noun. radiant brightness or light: the radiance of the tropical sun. warm, cheerful brightness: the radiance of her expression. Rare. radiation.
What kind of word is radiance?
the quality of being radiant, shining, bright or splendid. the flux of radiation emitted per unit solid angle in a given direction by a unit area of a source.
What is spectral reflectance?
The spectral reflectance is the reflectance measured at a given Ts and λ, within a small wavelength interval, Δλ, centered at λ [7]. Spectral reflectance is typically named monochromatic reflectance and may be specular, diffuse, or hemispherical.
What is the difference between radiant and radiance?
As nouns the difference between radiant and radiance is that radiant is a point source from which radiation is emitted while radiance is the quality of being radiant, shining, bright or splendid.
What is radiance and irradiance?
A spectral radiance measurement expresses radiance as a function of wavelength or frequency. Irradiance Measurements. In contrast to radiance measurements, irradiance is the radiant flux received by a surface or the flux that is incident on the surface. The irradiance unit is determined as power per unit area.
What is the sentence of radiance?
Radiance sentence example. Then the sun will appear in all his radiance and fill the world with light. That takes all those up into itself, outshining them in radiance and glory. Just as whatsoever stars there be, their radiance avails not the sixteenth part of the radiance of the moon.
What is the synonym of radiance?
noun. 1’the radiance of the sun’ light, shining, brightness, brilliance, luminosity, radiation, beams, rays, illumination, blaze, glow, luminousness, gleam, lustre, glitter, sparkle, flash, dazzle, shimmer, glare. luminescence, incandescence, fluorescence, phosphorescence.
What is spectral response pattern?
A spectral response pattern is sometimes called a signature. It is a description (often in the form of a graph) of the degree to which energy is reflected in different regions of the spectrum. Most humans are very familiar with spectral response patterns since they are equivalent to the human concept of color.