A convex lens of refractive index 3/2 has a power of `2.5^(@)`. If it is placed in a liqud of refractive index 2,the new power of the lens is

A thin convex lens made of glass of refractive index 3//2 has a power of 5 D. When it is immersed in a liquid of refractive index mu , it behaves like a divergent lens of focal length 1 m. Calculate the refractive index of the liquid.

An equiconvex lens of refractive index 1.6 has power 4D in air. Its power in water is:

An equiconvex lens of refractive index 1.6 has power 4D in air. Its power in water is:

A convex lens of refractive index n behaves as a convex lens of smaller power in a liquid of refractive index n_1 and as a concave lens in another liquid of refractive index n_2 . Then relation between n, n_1 and n_2 is

A double convex lens of refractive index m_(1) is immersed in a liquid of refractive index m_(2) . This lens will act as:

A double convex lens of refractive index m_(1) is immersed in a liquid of refractive index m_(2) . This lens will act as: