Question

Correct labelling of angles ‘i1’, ‘A’ and ‘d’ in the following figure is:



(a) i1 – Angle of emergence, A – Angle of Prism, d – Angle of deviation

(b) i1 – Angle of incidence, A – Angle of Prism, d – Angle of deviation

(c) i1 – Angle of emergence, A – Angle of Prism, d – Angle of incidence

(d) i1 – Angle of incidence, A – Angle of Prism, d – Angle of emergence​

Answer 1

Answer:

b) i1 – Angle of incidence, A – Angle of Prism, d – Angle of deviation

Answer 2

The Correct labeling of angles are:

i₁: Angle of incidence ⇒

• The angle between the incident ray and normal is called the angle of incidence.
• The angle of incidence will be equal to the angle of emergence during minimum deviation.

A: Angle of Prism⇒

• The angle formed due to two lateral faces of the prism is known as the angle of the prism

d: Angle of deviation⇒

• the incident ray, when extended forward and the emergent ray extended backward, gives the angle of deviation.

Hence, the correct option is (b).