Question

verifying sin i /sin r is a constant observation

Answer 1

1)the incident that the reflected ray and the normal to the interface of two transparent in India at the point of incidence for line the same plane 2)the ratio of sine of angle of incidence to the Sine of angle of reflection is a constant for the light of a given colour and for the given pair of media this law is known as Snell's law of refraction.