Question

1) Give an expression for Snell's Law.

2) What are the units of refractive index?

3) When a light ray travels from air to glass, where does it bend?

Plz give only correct answer I will mark u as branliest. not inappropriate answers. ​

Answer 1

Answer:

1) Snell's law : The ratio sine of angle of incidence to the sine of angle of refraction is a constant for a given color of light and for a given pair of media. Sin i/ Sin r = constant. This constant is the refractive index of the second medium w.r.t the first.   {n1/n2 = sin α2/sin α1}

2) Glass is denser than air, so a light ray passing from air into glass slows down. If the ray meets the boundary at an angle to the normal , it bends towards the normal. ... A light ray speeds up as it passes from glass into air, and bends away from the normal by the same angle.

3) If light enters any substance with a higher refractive index (such as from air into glass) it slows down. The light bends towards the normal line. If light travels enters into a substance with a lower refractive index (such as from water into air) it speeds up. The light bends away from the normal line