Question

Draw the Ray diagram to show the critical angle when a light ray passing through optically rarer medium and a danser medium

Answer 1

the critical angle passing through rarer to denser medium

Answer 2

" The Critical angle is that angle of incidence which at a particular degree causes make the incident ray deviate to such an angle to be parallel to the second medium.

And the critical angle is formed when a ray passes from a denser medium to a rarer medium as hereby medium two is denser than medium one. Beyond critical angle, the ray will undergo total internal reflection."