An Etymological Dictionary of Astronomy and Astrophysics
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Tending or serving to disperse.

From → disperse + → -ive.

The reciprocal of the → dispersive power.

→ dispersive; → index.

A medium in which the → phase velocity is a function of → wave number (→ frequency).

→ dispersive; → medium.

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.

→ dispersive; → power.

A medium in which the → phase velocity is independent of frequency.

→ non-; → dispersive; → medium.