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Solution


Q.

Read the passage carefully and answer the following questions from (i) to (v).

Splitting of white light into its seven constituent colours when passed through a glass prism is known as dispersion. All the colours travel at the same speed when they travel in vacuum. But when they pass through a medium, such as a glass prism, the colours bend or refract at different angles, and therefore the speed changes. Red colour bends the least and violet deviates the most.

 

(iii) Consider statements S₁ and S₂ for the figure given below:

S₁: The ray of light which emerges out of Prism F will be white light.

S₂: The refraction produced by the prism F is equal and opposite to that of Prism E.
1 Both S₁ and S₂ are true and S₂ is the correct explanation of S₁  
2 Both S₁ and S₂ are true but S₂ is not the correct explanation of S₁  
3 S₁ is true but S₂ is false  
4 S₂ is true but S₁ is false  

Ans.

(1)