Q 1346134973.     An equi - convex lens of crown and equi concave lens of flint glass make an achromatic system. The radius of curvature of convex lens is `0.54` `m`. If the focal length of combination for mean colour is `1.5` `m` and `RI` for crown glass are `mu _R= 1.53` and `mu_v =1.55` Then the dispersive power of flint glass is

A

`0.4`

B

`0.55`

C

`0.65`

D

`0.7`

HINT

System is achromatic ` frac{w_c}{f_c}+ frac{w_f}{w_F}=0`

Today's Score

0
Success Rate: NAN %

Practice & Test

Sr. No.SubjectTagCorrectRecorded Answer