A convex lens made of glass is immersed in a liquid denser than glass. Which of the following

Options: determine its behaviour?

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Plane glass

Diverging lens

Converging lens

Plano Cover lens

answer is B.

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Detailed Solution

A convex lens made of glass is immersed in a liquid denser than glass. It will behave as a
diverging lens.
The refractive index of a lens determines whether it can act as a converging or diverging lens.
The medium in which a lens is placed affects the refractive index of the lens's material or

n

.
The convex lens's focal length will change if it is placed in a medium other than air because
of changes in

n

. Whenever

n

falls,

f

rises. Therefore, if you submerge a convex lens in a
liquid with a refractive index greater than the material's refractive index, the lens will change
into a concave lens and begin diverging light instead of focusing it on a single point. Its nature will change from converging to diverging lenses.

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