A biconvex lens behaves like a convergen...

A biconvex lens behaves like a convergent in air but hehaves like a divergent in water. Then refractive index `(mu_L)` of the lens will be -

`mu_l=1`

`mu_l=1.33

`1ltmu_llt 1.33

`1ltmu_llt1.33`

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