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Q.4.State the characteristics of the image, formed by a plane mirror., , Ans.(i) Plane mirror forms an erect image., , (ii) It forms a virtual image., , (iii) Size of the image is same as that of the object., (iv)Image is formed at the same distance behind, the mirror as the object stands in front of it., , (v) Image formed is a laterally inverted image i.e.,, right hand side of the object seems to be the left, hand side and vice-versa., , Q.5.Find out the letters of English alphabet or, any other language known to you in which the, image formed in a plane mirror appears exactly, like the letter itself. Discuss your findings., Ans.Letters like A, H, |, M, O, T, U,V, W etc. appear, same when seen through a plane mirror, , Scanned with CamScanner

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Q.6.What is a virtual image? Give one situation, where a virtual image is formed., , Ans.The image which cannot be taken on a screen, is called virtual image. When some object is placed, very close to the concave mirror we don't get any, image on the white screen placed behind the, mirror. Such image is called virtual image., , Q.7. State two differences between a convex, and a concave lens., , , , , , , , , , Convex lens Concave lens, ()) Convex lens can form both || (i) Concave lens always forms, real and virtual images. a virtual image., (i) It can form magnified image. | (i) Image is always diminished in size., , , , , , ‘Scanned with CamScanner

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Q.8. Give one use each of a concave and a, convex mirror., , Ans. Use of concave mirror:, , Concave mirror is used by dentists to examine the, teeth., , Use of convex mirror:, , Convex mirror is used as side view mirror in, vehicles, , Q.9. Which type of mirror can form a real image?, Ans. Concave mirror can form a real image., , Q.10. Which type of lens forms always a virtual, , image?, , Ans. Concave lens always forms a virtual image., , Scanned with CamScanner