Question

Study the following ray diagram:

In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by

(A) y, p, z

(B) x, q, z

(C) p, y, z

(D) p, z, y

Answer 1

Angle p is the angle of incidence since this angle is formed between the incident ray and the normal. 

Angle y is the angle of emergence as it is formed between the emergent ray and the normal.  

and angle z is the angle of deviation as it is formed between the emergent ray and the incident ray. 

Hence, the correct answer is p, y, z