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

Answer: (C)

p, y, z

It is clear from the diagram,

Angle of incidence $=p$

The angle of incidence is the angle between the incident ray and the normal.

Angle of emergence $=y$

The angle of emergence is the angle between the angle between the emergent ray and the normal.

And Angle of deviation$=z$

The Angle of emergence is angle between the incident ray and the emergence ray.

So the proper sequence is $p,y,z$