Match the items given in Column I with one or more items of Column II. Column I Column II (A) A plane mirror (i) Used as a magnifying glass. (B) A convex mirror (ii) Can form the image of objects spreads over a large area. (C) A convex lens (iii) Used by dentists to see an enlarged image of teeth. (D) A concave mirror (iv) The image is always inverted and magnified. (E) A concave lens (v) The image is erect and of the same size as the object. (vi) The image is erect and smaller than the object.

(A) A plane mirror - (v) The image is erect and of the same size as the object. The image formed by a plane mirror is of the same size and shape as the object. The image formed will be virtual and erect. (B) A convex mirror - (ii) Can form an image of objects spreads over a large area. (vi) The image is erect and smaller than the object. Convex mirrors form images that are diminished and erect. Thus, they are used as a side view mirror for vehicles as they enable the driver to see over a large area behind the vehicle. (C) A convex lens - (i) Used as a magnifying glass. A magnifying glass is a convex lens that is used to produce a magnified image of an object. (D) A concave mirror - (iii) Used by dentists to see an enlarged image of teeth, Concave mirrors are used by dentists to see an enlarged image of teeth. (E) A concave lens - (vi) The image is erect and smaller than the object. A concave lens always produces a virtual, erect, and diminished image. Column I Column II (A) A plane mirror (v) The image is erect and of the same size as the object. (B) A convex mirror (ii) Can form an image of objects spreads over a large area. (vi)The image is erect and smaller than the object. (C) A convex lens (i) Used as a magnifying glass. (D) A concave mirror (iii) Used by dentists to see an enlarged image of teeth. (E) A concave lens (vi) The image is erect and smaller than the object.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 2

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We can obtain an enlarged and erect image by a convex mirror.

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Important Questions on Light

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 2

A concave lens always forms a virtual image.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 2

We can obtain a real, enlarged and inverted image by a concave mirror.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 2

A real image cannot be obtained on a screen.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 2

A concave mirror always forms a real image.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 3

Match the items given in Column I with one or more items of Column II.

Column I	Column II
(A) A plane mirror	(i) Used as a magnifying glass.
(B) A convex mirror	(ii) Can form the image of objects spreads over a large area.
(C) A convex lens	(iii) Used by dentists to see an enlarged image of teeth.
(D) A concave mirror	(iv) The image is always inverted and magnified.
(E) A concave lens	(v) The image is erect and of the same size as the object.
	(vi) The image is erect and smaller than the object.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 4

State the characteristics of the image formed by a plane mirror.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>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.

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SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 6

What is a virtual image? Give one situation where a virtual image is formed.