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(a) With the help of labelled ray diagram show the path followed by a narrow beam of monochromatic light when it passes through a glass prism.
(b) What would happen if this beam is replaced by a narrow beam of white light ?

 

 

 

 
 
 
 
 

Answers (1)

(a) The path followed by a narrow beam of monochromatic light when it passes through a glass prism is shown in the diagram below, 


(b)If this beam is replaced by a narrow beam of white light, it will splict into sectrum of seven colours shown in the diagram below, 

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