The focal length of a lens for red, yell...

The focal length of a lens for red, yellow and violet lights are `f_r` , `f_y `and `f_v` respectively. The relation between then is

A

`f_r lt f_y lt f_v`

B

`f_v gt f_r gt f_y`

C

`f_y gt f_r gt f_v`

D

`f_r gt f_y gt f_v`

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The correct Answer is:

D

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