GEOLOGY

Detailed explanation-1: -If the angle of incidence is greater than the critical angle, light is not refracted at all, when it falls on the surface from a denser medium to a rarer medium.

Detailed explanation-2: -When the angle of incidence of a ray is greater than the critical angle, the refracted ray is in the same medium, i.e., the light is totally reflected in the same medium.

Detailed explanation-3: -Total internal reflection Partial reflection occurs when angle of incidence is less than critical angle whereas total internal reflection occurs when angle of incidence is greater than critical angle.

Detailed explanation-4: -If the angle of incidence is increased beyond that angle, then refraction does not occur! All of the light incident on the interface is reflected back into the incident medium!

Detailed explanation-5: -If the angle of incidence is greater than the critical angle, the ray will be reflected back to the same medium without undergoing refraction. This is known as total internal reflection.