In the following ray diagram, the correctly marked  angle are: 

 

(a) ∠i and ∠e

(b) ∠A and ∠D

(c) ∠i, ∠e and ∠D

(d) ∠r, ∠A and ∠D

q18.jpg

Answer

refraction-of-light-through-a-glass-prism---teachoo.jpg

 

  • Angle of incidence is the angle between incident ray and normal.
    Here, angle of incidence is not with normal .   It is marked incorrectly

  • Angle of refraction is the angle between refracted ray and normal.
    So, here angle of incidence is angle r. So, it is marked correct

 

  • Angle of emergence is the angle between emergent ray and normal.
    Here, angle of emergence is not with normal .   It is marked incorrectly

  • Angle of deviation is the angle between emergent ray and incident ray (when produced backwards).
    So, here angle of incidence is angle D. So, it is marked correct

 

  • Angle of prism is the vertex angle of the prism.
    Here, it is angle A. It is marked correct

So, the correct answer is (b) -  ∠A and ∠D

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo