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Solution


Q.

When white light enters a glass prism from air, the angle of deviation is least for:
1 Blue light  
2 Yellow light  
3 Violet light  
4 Red light  

Ans.

(4)

When white light enters a glass prism from air, the angle of deviation is least for red light. The white light consists of seven colours in which violet has the least wavelength and red colour has the maximum wavelength.