Daylight and Its Spectrum

actinometer aerosol air mass albedo Ångström artificial daylight atmosphere Bener blue calculated calibration cent changes Chapter cloud colorimetry colour matching colour rendering colour temperature compared comparison corrections daylight spectrum dominant wavelength earth effects emission experimental extrapolation extraterrestrial filters fluorescent tubes flux Fraunhofer full radiator locus global radiation Henderson and Hodgkiss incandescent included infra-red kW/m² L/min Labs and Neckel lamp light sources lines luminance maximum measurements ments method mireds monochromator moon natural daylight nm intervals normal north sky observations ozone photomultiplier photosphere Planckian locus prism produced radiance radiant flux range Rayleigh scattering reflection Sastri scale showed skylight solar altitude solar constant solar irradiance solar radiation solar spectrum spectral curves spectral distribution spectral power distribution spectrophotometry Standard Illuminant sun's sunlight surface Table tion tungsten ultra-violet radiation values variations vector visible spectrum W/m² water vapour Wavelength nm zenith sky