Question

Is refractive index a universal constant

Answer 1

Explanation:

The refractive index (n?) of a material is defined as the ratio of velocity of light in a vacuum to that in a defined material. The refractive index of a glass is not a constant, but depends on the wavelength of the incident light, known as dispersion.

Answer 2

Answer:

refractive index. (Or index of refraction; also absolute refractive index.) The ratio of the free- space speed of light c, a universal constant, to the phase velocity of a plane harmonic electromagnetic wave in an optically homogeneous, unbounded medium.