Question

Shown below are the cross-sections of four transparent objects. The direction of the incident ray and the refracted ray are shown. 

(a) In which of the case(s) will the emergent ray be parallel to the direction of the incident ray? Explain why. 

(b) In each of the four cases draw the direction of the emergent ray. 

Answer 1

(a) In Q and S, the emergent ray will be parallel to the incident ray because the two refracting surfaces are parallel. 

In P and R, the refracting surfaces are not parallel. 

(b)