Question

what is Snell's law​

Answer 1

Snell's law, in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index of each. This law was discovered in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius).

Answer 2

Answer:

A law stating that the ratio of the sines of the angles of incidence and refraction of a wave are constant when it passes between two given media.