Question

Snell's law is applicable
( a ) only when incident ray is normal to the surface of separation.
( b ) only when incident ray grazes along the surface of separation.
( c ) for all angles of incidence.
( d ) none of these.​

Answer 1

Explanation:

Snell's law is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.