dimensioonita suurus, mis iseloomustab optilise kiirguse nõrgenemist neeldumisel ja hajumisel aines
a measure of the light-stopping power of a transparent material; it is defined as the logarithm of the opacity, which is the reciprocal of the transmission ratio
Hea teada
DE: optische Dichte [T45102]
FR: densité optique [T45102]
