Question

what are the laws of refraction

Answer 1

Snell's law (also known as Snell–Descartes law and the law of refraction) is a formulaused to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.

Answer 2

Consider a light-ray incident on a plane mirror, as shown in Fig. 56. The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence .