Spectral power distribution

Figure showing the greater proportion of blue light scattered by the atmosphere relative to red light.

Color temperature comparison of common electric lamps

In radiometry, photometry and color science, a spectral power distribution (SPD) measurement describes the power per unit area per unit wavelength of an illumination (radiant exitance). More generally, the term spectral power distribution can refer to the concentration, as a function of wavelength, of any radiometric or photometric quantity (e.g. radiant energy, radiant flux, radiant intensity, radiance, irradiance, radiant exitance, radiosity, luminance, luminous flux, luminous intensity, illuminance, luminous emittance).

单词	Spectral power distribution
释义	Spectral power distribution 英语百科 Spectral power distribution In radiometry, photometry and color science, a spectral power distribution (SPD) measurement describes the power per unit area per unit wavelength of an illumination (radiant exitance). More generally, the term spectral power distribution can refer to the concentration, as a function of wavelength, of any radiometric or photometric quantity (e.g. radiant energy, radiant flux, radiant intensity, radiance, irradiance, radiant exitance, radiosity, luminance, luminous flux, luminous intensity, illuminance, luminous emittance).
随便看	Opaque,Panavia opaque paper opaque particles opaque photocathode opaque plane opaque plant opaque plasma opaque porcelain opaque projecting opaque projection Opaque projector opaque quartz glass opaquer opaque reflector opaque region opaques opaque screen opaque silica glass opaque sky cover opaque spot opaquest opaque stone opaque substance opaque surface opaque syrup