# What will be the focal length of a convex lens placed in water?

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When any lens or glass slab is immersed in a liquid whose refractive index is equal to that of lens, refractive index of lens will be equal to 1 relative to that liquid. The focal length of the lens in this case, will tend to infinity.

## What happens to focal length of convex lens when it is immersed in water?

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.

## Will the focal length of an image change when it is placed in water a convex lens has a focal length of 50 cm What is its power?

A convex lens have focal length of 20 cm. the material of lens has refractive index of 1. 5 is immersed in water of refractive index 4/3. find the change in focal length of the lens.

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## Does focal length of lens change in water?

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

## What happens to the focal length of a convex lens?

Thus, the focal length of the lens will increase. When any lens or glass slab is immersed in a liquid whose refractive index is equal to that of lens, refractive index of lens will be equal to 1 relative to that liquid. The focal length of the lens in this case, will tend to infinity. ⇒f=∞ .

## What happens to focal length of concave lens in water?

when concave lens immersed in water the focal length of lens increases because focal length of lens is directly proportional to refractive index of medium and when immersed in water the medium become more dancer so its focal length increases.

## What happens to the focal length of a convex lens when it is cut horizontally?

Answer: If a convex lens is cut horizontally then radii of curvature on both sides of the lens i.e., R1 and R2 will remain same as before. As R1 and R2 do not change, so there will be no change in focal length of the lens.

## When a convex lens having focal length 12 cm is immersed in water its focal length becomes?

What happens to focal length of a convex lens when it is immersed in water ? ∴fw>fa, i.e., focal length of lens will increase.

## Which convex lens has more focal length?

For convex lenses with a big thickness, this means that the light rays travel inside them for a longer period of time. As a consequence, the the light rays are bent more in the thick convex lenses. As the bending of light rays increases, the focal length decreases. Hence, thin convex lenses have a higher focal length.

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## When a lens is placed in water?

The focal length of the lens will increase when lens is immersed in water.

## What happens when focal length increases?

The longer the focal length, the narrower the angle of view and the higher the magnification. The shorter the focal length, the wider the angle of view and the lower the magnification.

## Does the focal length of a lens change?

Originally Answered: Does the focal length of a convex lens change by changing the distance of an object? No. The focal length of a lens is a function of the lens and the medium in which it is located (normally air).