Question

Laws of refraction .......

Answer 1

laws of reflection = Snell's law= sin I/sin r=v¹/v²

Answer 2

$\huge\textbf{Laws of Refraction :}$


1) The incident ray, refracted ray and the normal; at the point of incidence all lie in the small plane.

2) The ratio of sine of angle of incidence with sine of angle of refraction is always equal to relative refractive index of medium 2 with respect to medium 1.

i.e.

μ1 sin i = μ2 sin r

OR

sin i ÷ sin r = μ2 ÷ μ1

μ1 = medium in which incident ray.

μ2 = medium in which refracted ray.