remission

remission (In French rémission) controversially defined phenomenon describing the casting back of light waves and simultaneous weakening of the luminous flux (see reflection). In accordance with the understanding of remission in colorimetry (see spectral luminance factor) the following distinction can be made: Remission is the emission of radiation by all secondary radiators. Only the spectral elements of the irradiated light that are not absorbed by a surface are remitted by this surface, e.g. red surfaces remit the red radiation elements and absorb the green and blue elements.