This naturally occurring substance has the highest known Abbe number, indicating that the material has low dispersion.

Fluorite has a very low dispersion, so lenses made from it exhibit less chromatic aberration than those made of ordinary glass.

Their low RIs also mean a much lower dispersion (0.018 and 0.020), so even when cut into brilliants they lack the fire of diamond.

So a lens with fluorite elements has a low dispersion that allows it to be called an apo, or apochromatic, lens.

It also has two zero-dispersion points, and low dispersion over a much wider wavelength range than standard singly clad fiber.

All these were of low dispersion and low resolving power.

It has relatively low refractive index ( 1.52) and low dispersion (with Abbe numbers around 60).

This is advantageous because it allows a communication system to possess both low dispersion and low attenuation.

Compared to binary search, Fibonacci search examines locations whose addresses have lower dispersion.

Such engraved materials are of high-grade optical quality (suitable for lenses, with low dispersion) to minimize distortion of the beam.