Question

What is an angle made between the incident ray and normal at the point of incidence called?

• A. Angle of deviation
• B. Angle of incidence
• C. Angle of refraction
• D. Angle of emergence

Answer 1

The correct option is B

Angle of incidence

The explanation for the correct option(s):
Option B:

1. The angle of incidence: The angle made between the incident ray (AB) and normal at the point of incidence i.e point B.
2. Here it is denoted by $\angle i_{1.}$
   

The explanation for the incorrect option(s):

1. Option A: Angle of deviation ($\angle d$): It is the angle between the incident ray and the emergent ray as shown below.
   
2. Option C: Angle of refraction: In a glass slab the angle between refracted ray (BC) and the normal at point B i.e $\angle r_{1.}$
3. Option D: The angle of emergence: The angle subtended by the emergence ray with the normal at point Q.
   
   

Hence, the correct answer is option B.