Tending or serving to disperse.
Fr.: indice de dispersion
The reciprocal of the → dispersive power.
Fr.: milieu dispersif
Fr.: pouvoir dispersif
A measure of the ability of a medium to separate different colors of light. It is defined by: (n2 - n1)/(n - 1), where n1 and n2 are refractive indices at two specified widely differing wavelengths, and n is the → index of refraction for the average of these wavelengths.
Fr.: milieu non dispersif
A medium in which the → phase velocity is independent of frequency.