Q15 of 284 Page 252

State one practical use each of convex mirror, concave mirror, convex lens and concave lens.

One practical use each of convex mirror, concave mirror, convex lens and concave lens is

Use of convex mirror: As rear-view mirror in vehicles


Use of concave mirror: As shaving mirrors


Use of convex lens: For making simple camera


Use of concave lens: As eye-lens in Galilean telescope


More from this chapter

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14

How would a pencil look like if you saw it through?

(a) A concave lens, and


(b) A convex lens? (Assume the pencil is close to the lens). Is the image real or virtual?

 15

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.

 16

Construct ray diagrams to illustrate the formation of a virtual image using (i) a converging lens, and

(ii) A diverging lens.

 16

What is the difference between the two images formed above?