A symmetrical bioconcave lens having rad...

A symmetrical bioconcave lens having radius of curvature R is made up to two different materials as shown in figure. A parallel beam of light passing through the lens appear to diverge from two different points. Find the distance between them.

`2/R (mu_1 - mu_2)`

`R/2 ((mu_2 -mu_1))/((mu_1 - 1)(mu_2 - 1))`

`R/2 ((mu_2 - 1)/(mu_1 - 1))`

`R/2 ((mu_1 - 1)/(mu_2 -1))`

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