What is the power of a convex lens?

The power of convex lens is positive.

What is meant by power of lens?

The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). p o w e r o f a l e n s ( D ) = 1 f o c a l l e n g t h ( m ) P = 1 f. Converging (convex ) lenses have positive focal lengths, so they also have positive power values.

What is the magnifying power of a convex lens?

Magnification produced by Convex Lens Magnification is positive for virtual image and negative for real image. When |m|>1, the image is magnified. When |m|<1, the image is diminished. When |m|=1, the image is of the same size as that of the object.

What is the power of convex concave lens?

The focal length of a concave surface is negative, whereas the focal length of a convex surface is positive. Therefore, for a lens, the power of a concave and convex lens is negative and positive respectively.

What is the power of convex lens Class 10?

Convex lens power is defined as the ability of the lens to converge the rays of light which fall on it as shown in the below figure. It can mathematically be defined as P = 1f, where f is the focal length.

What is power of concave lens?

The power of the lens is the reciprocal of the focal length. A concave lens is a diverging lens, so it will always have a negative focal length. Therefore, the power of a concave lens is also negative.

What is the power of convex mirror?

The focal length and power of a convex mirror are negative, since it is a diverging mirror.

What is magnifying power of a lens?

Magnification of a lens is defined as the ratio of the height of an image to the height of an object. It is also given in terms of image distance and object distance. It is equal to the ratio of image distance to that of object distance. m = h i h o = v u.

What is the magnifying power of a concave lens?

Therefore, the magnification produced by a concave lens is always less than 1.

What is power of convex mirror?

P=f1. As the focal length of the convex mirror does not depend on the factor such as the refractive index of any medium. Hence even after the convex mirror is immersed in water, the focal length remains unchanged. Hence the power of the convex mirror also remains same.

Why the power of convex lens is positive?

The power of a convex lens is positive as a convex lens has a positive focal length, while the power of a concave lens is negative as concave lens has a negative focal length. It is because focal length of convex lens is +ve and. Since P=1/f. Therefore power of convex lens is positive.

Why power of convex lens is positive?