Study the following ray diagram:  

Question 3 [CBSE Board, All India Region, 2017].jpg

In this diagram, the angle of incidence, the angle of  emergence and the angle of deviation respectively  have been represented by  

(A) y, p and z 

(B) x, q and z  

(C) p, y and z 

(D) p, z and y  

 

Answer

 

  • The angle between the incident ray   and the normal is known as the angle of incidence .
    This is angle y in our figure

  • The angle between the emergent ray and the normal is known as the angle of emergence

This is angle y in our figure

  • The angle between emergent ray and incident ray produced backwards is called the angle of deviation .

Labelled figure with angle of incidence, emergence and deviation.jpg

So, the correct answer is (c) p, y and z 

  1. Class 10
  2. Chapter 11 Class 10 - Human Eye and Colourful World (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