Transmittance. Transmissivity
The ratio of the radiant flux transmitted by a body (medium) to the radiant flux incident on the surface of this body (medium).
Comment. We distinguish between "spectral" and "integral" transmittance.
The ratio of the radiant flux transmitted by a body (medium) to the radiant flux incident on the surface of this body (medium).
Comment. We distinguish between "spectral" and "integral" transmittance.