Which lens is converging: (i) an equiconcave lens or an equiconvex lens? (ii) a concavo-convex lens or a convexo-concave lens?

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Solution

(i) An equiconvex lens is converging.
(ii) A concavo-convex lens is converging.

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What is a lens ? Distinguish between a convex lens and a concave lens. Which of the two is a converging lens : convex lens or concave lens ?

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A concave-convex lens or a convex-concave lens?

Question 4

You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either

(a) concave mirror or convex mirror.

(b) concave mirror or convex lens.

(d) concave lens or convex lens.

Q. (a) An object is placed 10 cm from a lens of focal length 5 cm. Draw the ray diagrams to show the formation of image if the lens is (i) converging, and (ii) diverging.
(b) State one practical use each of convex mirror, concave mirror, convex lens and concave lens.

Q. Why is a convex lens called a converging lens and a concave lens called a diverging lens?

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Which lens is converging: (i) an equiconcave lens or an equiconvex lens? (ii) a concavo-convex lens or a convexo-concave lens?

(i) An equiconvex lens is converging. (ii) A concavo-convex lens is converging.

(i) An equiconvex lens is converging.
(ii) A concavo-convex lens is converging.