A) \[{{f}_{v}}={{f}_{g}}\]
B) \[{{f}_{g}}>{{f}_{r}}\]
C) \[{{f}_{v}}<{{f}_{r}}\]
D) \[{{f}_{g}}>{{f}_{r}}\]
Correct Answer: C
Solution :
Since the refractive index of violet colour \[({{\mu }_{v}})\] is greater than the refractive index of red colour \[({{\mu }_{r}}),\] therefore focal length of violet colour is less than the focal length of red colour or in other words. \[{{f}_{v}}<{{f}_{r}}.\]
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