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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.

 

(iv) Which of the following statements is incorrect
1 In the primary rainbow, red colour is formed on the outside and violet colour on the inside.  
2 A normal human eye cannot clearly see all the objects at different distances.  
3 A beam of white light gives a spectrum on passing through a hollow prism.  
4 All of the above  

Ans.

(3)