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

Options

A. `f_(2) gt f` and `f_(1)` becomes negative
B. `f_(1)` and `f_(2)` both become negative
C. `f_(1)=f_(2) lt f`
D. `f_(1) gt f` and `f_(2)` becomes negative

Answer

D