1.

The focal lengths for violet, green and red light rays are \[{{f}_{V}},{{f}_{G}}\]and \[{{f}_{R}}\] respectively. Which of the following is the true relationship    [BHU 2004; CBSE PMT 1997]

A.            \[{{f}_{R}}<{{f}_{G}}<{{f}_{V}}\]                                     
B.            \[{{f}_{V}}<{{f}_{G}}<{{f}_{R}}\]
C.            \[{{f}_{G}}<{{f}_{R}}<{{f}_{V}}\]                                     
D.            \[{{f}_{G}}<{{f}_{V}}<{{f}_{R}}\]
Answer» C.            \[{{f}_{G}}<{{f}_{R}}<{{f}_{V}}\]                                     


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