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A thin convex lens made from crown glass...

A thin convex lens made from crown glass `(mu=(3)/(2))` has focal f. When it is measured in two different liquids having refractive indices `(4)/(3)and(5)/(3)` it has the focal lengths `f_(1)andf_(2)` respectively. The corrent relation between the focal lengths is

A

`f_1= f_2 lt f`

B

`f_1 gt f and f_2 becomes negative`

C

`f_2 gt f and f_1 becomes negative`

D

`f_1 and f_2 both become negative`

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