The amount of radiant energy flux expressed in terms of the solar spectrum. NREL's Solar Spectral Radiation Data Base contains thousands of irradiance spectra.
The radiant flux density incident on a surface, resolved spectrally. (W/m2/um).
see spectral flux
Energy at a specific wavelength radiated onto an object of unit area per unit time. Standard measurement unit W m-2 µm-1.
The monochromatic irradiance of a surface per unit bandwidth at a particular wavelength, usually expressed in Watts per square meter-nanometer bandwidth.
The irradiance per unit wavelength or wavenumber interval. Units are typically W mâˆ’2 Î¼mâˆ’1 or W mâˆ’2(cmâˆ’1)âˆ’1.