Question

Consider the path of a ray of light passing through a rectangular glass slab for different angles of incidence. 

(i) Which one is greater: angle of incidence or angle of refraction? 

(ii) What happens to the emergent angle on increasing the incident angle at air-glass interface? 

(iii) State the conditions when no bending occurs.

Answer 1

(i) ∠i = ∠e. 

(ii) Angle of emergence also increases. 

(iii) The light ray falls along the normal or the refractive index of the two optical media are equal.