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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.

(v) The rectangular surfaces of a prism are known as:
1 Reflecting surfaces  
2 Dispersing surfaces  
3 Refracting surfaces  
4 Scattering surfaces  

Ans.

(3)