Question

Differentiate between concave and convex lens on the basis of the

following points :

(i) Thickness of the lens.

(ii) Nature of the principal focus.

(iii) Focal length.​

Answer 1

Answer:

A convex lens or converging lens focuses the light rays to a specific point whereas a concave lens or diverging lens diverges the light rays. When these lenses are combined, they produce sharper images. ... Most of the eyeglass lenses use combinations of convex and concave lenses.

Answer 2

Answer:

Convex lens:                                                        Concave lens:

(1)The converging lens in air.                           (1)The diverging lens in air.

(2)The principal focus behind the lens.          (2)Principal focus is infront of lens.

(3)Used as magnifying lens.                            (3)Used in projectors.

(4)Forms both real and virtual images.           (4)Only form virtual image.

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