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Solution


Q.

Read the passage given below and answer the following questions from (i) to (v):

A prism is a transparent refractive medium bounded by two plane surfaces inclined to each other at a certain angle. The refraction of light through a prism follows the laws of refraction. In the prism, refraction takes place on its refracting surface i.e., entrance and exit. The refraction through a prism is shown in the figure. Here, A is the angle of the prism, ∠i is the angle of incidence on the face AB, and ∠e is the angle of emergence at another face AC. The incident ray suffers a deviation or bending through an angle delta due to the refraction through the prism. This angle is called the angle of deviation as shown in the figure.

(iii) When a ray is refracted through a prism, then:
1 ∠i = ∠δ  
2 ∠i = ∠e + ∠δ  
3 ∠δ = ∠e  
4 ∠i > ∠r  

Ans.

(4)