Question

The ratio of the speed of light in vacuum to that in a medium is known as
(a) magnification
(b) refraction
(c) refractive index
(d) Snell’s law

Answer 1

Explanation:

The ratio of the speed of light in vacuum to that in a medium is known as

(a) magnification

(b) refraction✓✓✓✓

(c) refractive index

(d) Snell’s law

Answer 2

Explanation:

Answer--It is known as Refraction.