Focal length of convex lens for red, gre...

Focal length of convex lens for red, green and blue colour are `f_r , f_g`, and `f_b` respectively, so which of the following statements is true ?

`f_r lt f_g`

`f_g lt f_r`

`f_b gt f_r`

`f_r = f_g = f_b`

Text Solution

Verified by Experts

The correct Answer is:

`1/f=((n_g)/(n_m)-1)(1/R_1-1/R_2)`

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