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:

Explanation:

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

Answer 2

Answer:

Angle of incidence = 'p'

Angle of emergence = 'y'

Angle of deviation = 'z'

Therefore, the correct sequence is p,y,z

Option [C]

Explanation :

Angle of incidence

The angle between the incident ray and the normal.

Angle of emergence

The angle between the emergent ray and the normal.

Angle of deviation

The angle between the incident ray and the emergence ray.