Is the power of lens going to change if it is dipped in water?

to decrease. And thus the power of the lens gets decreased.

When a glass lens with refractive index 1.47 is immersed in a liquid?

biconvex lens
A biconvex lens of glass having refractive index 1.47 is immersed in a liquid. It becomes invisible and behaves as a plane glass plate.

What happens when a convex lens is immersed in a liquid of higher refractive index than the lens itself?

So if you immerse the convex lens in a liquid whose refractive index is greater than refractive index of material of lens then it will change its nature and become concave lens and thus it will start diverging the rays rather than focusing them on a single point.

When a Biconvex lens of glass having refractive index 1.47 is dipped in a liquid A acts as a plane sheet of glass this applies that the liquid must have refractive index?

This implies that the liquid must have refractive index. When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index.

How would a Biconvex lens appear when placed in a trough?

A biconvex lens appears plane glass when placed in a trough of liquid having the same refractive index as that of the lens.

When a glass lens is immersed in a liquid having refractive index same as that of glass then?

Explanation:If glass rod is immersed in a liquid of a same refractive index then it will disappear. Objects are visible when they reflect the light when object is immersed in a liquid having refractive index different than that of object then some of light is ferreted and some is reflected back.

When a lens is immersed in water its focal length?

Now since the focal length is inversely proportional to the (μ−1), therefore the focal length will increase. Hence the focal length of the lens increases when it is immersed in the water. Hence, Option A is correct.

Does the focal length of the lens changes when immersed in water will it increase or decrease?

Yes. Focal length changes when lens is immersed in water.

Under what conditions does a Biconvex lens of glass having a certain refractive index?

A biconvex lens will act like a plane sheet of glass if it is immersed in a liquid having the same index of refraction as itself. In this case, the focal length 1/f = 0 or f →∞.