# What is the focal length of a concave lens having power 5 0 D?

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## What is the focal length of a concave lens having power 5.0 D?

∴ Focal length = 20 cm.

## What will be the focal length of convex lens whose power is 5.0 D?

we know, power of a lens is reciprocal of its focal length. hence, focal length of convex lens should be 20cm, if power of it is 5D.

## What is the focal length of a lens with 0.5 D?

Note: The power of the lens is said to be 1 dioptre if the focal length of the lens is 1metre. That means, if the corrective power of the lens is +0.5D, the required lens is a convex lens of focal length +2m.

## What is the focal length of a concave lens of power 2.0 D?

Focal length of the lens is -50cm or 0.5m.

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## What is the focal length of convex lens having power?

The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). Converging (convex ) lenses have positive focal lengths, so they also have positive power values. Diverging (concave ) lenses have negative focal lengths, so they also have negative power values.

## What is the focal length of a lens having power?

Power of lense = 1/ focal length in meter. A concave lens has a negative focal length. Therefore, it is a concave lens.

Thank you.

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## What will be the focal length of a lens of power +5.0 D what type of lens is it?

The focal length of the given lens. Hence,the focal length of the lens is -0.2 metres. As mentioned in the previous calculation,the given lens has a negative focal length and that’s why the given lens is a concave lens. Only concave lenses have negative focal lengths.

## What power does 0.5 d have?

The nature of a lens having a power of + 0.5 D is Convex lens.

## What is the power of a convex lens if the focal length is 25 cm?

In this question it is given that the lens is convex, and its focal length is \$25\$ cm. First we will convert the focal length in meters. As it is a convex lens so its power is positive. Thus, the power of the lens is \$+ 4D\$.

## Which lens is used if D value is negative?

The focal length of a convex lens is positive and that of a concave lens is negative.

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## What is the focal length and nature of the lens whose power is 0.5 D?

the nature of the lens is convex because convex lens has converging properties along with being positive. This discussion on A lens has a power of +0.5 D.