radiance Englisch Deutsch:
radiance Definition:
- In radiometry, radiance is the radiant flux emitted, reflected, transmitted or received by a surface, per unit solid angle per unit projected area, and spectral radiance is the radiance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. These are directional quantities. The SI unit of radiance is the watt per steradian per square metre , while that of spectral radiance in frequency is the watt per steradian per square metre per hertz and that of spectral radiance in wavelength is the watt per steradian per square metre, per metre ?commonly the watt per steradian per square metre per nanometre . The microflick is also used to measure spectral radiance in some fields. Radiance is used to characterize diffuse emission and reflection of electromagnetic radiation, or to quantify emission of neutrinos and other particles. Historically, radiance is called "intensity" and spectral radiance is called "specific intensity". Many fields still use this nomenclature. It is especially dominant in heat transfer, astrophysics and astronomy. "Intensity" has many other meanings in physics, with the most common being power per unit area.
| Radiance (n.) Alt. of Radiancy |
| radiance / radiancy / shine / effulgence / refulgence / refulgency the quality of being bright and sending out rays of light |
| radiance / glow glowing the amount of electromagnetic radiation leaving or arriving at a point on a surface |
| radiance an attractive combination of good health and happiness, "the radiance of her countenance" |
radiance Synonyme:
| radiance aura blare blaze blaze of glory blazing light blinding light blitheness blithesomeness bright light brightness brilliance brilliancy brilliant light burst of light charisma cheer cheerfulness cheeriness cheery vein coruscation dazzle dazzling light delight diffusion dispersion effulgence emanation envelope eupeptic mien flamboyance flood of light fulgor geniality gladness gladsomeness glamour glare glaring light gleam gloriousness glory glow good cheer gorgeousness halo happiness heavenliness highlight hopefulness illumination illustriousness incandescence irradiance irradiancy irradiation joy light light source luminosity luminous energy luminousness luster magic mystique nimbus numinousness optimism phosphorescence photosensitivity pleasantness pleasure radiancy radiant energy radiant splendor radiation radius ravishingness ray refulgence refulgency resplendence resplendency rosy expectation sanguine humor sanguineness scattering scintillation shimmer shine sidelight sparkle splendidness splendor splendorousness splendrousness spoke streaming light sublimity sunniness twinkle visible radiation vividness warmth winsomeness |