# Solution - Mirror Formula and Magnification

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ConceptMirror Formula and Magnification

#### Question

A student wants to project the image of a candle flame on a screen 90 cm in front of a mirror by keeping the flame at a distance of 15 cm from its pole.

(a) Suggest the type of mirror he should use.

(b) Determine the linear magnification in this case.

(c) Find the distance between the object and its image.

(d) Draw ray diagram to show the image formation in this case

#### Solution

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An object of 10 cm is placed in front of a plane mirror. The height of image will be …………….
(a) 5 cm
(b) 15 cm
(c) 20 cm
(d) 10 cm

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A student has obtained an image of a well-illuminated distant object on a screen to determine the focal length, F1of the given spherical mirror. The teacher then gave him another mirror of focal length, F2 and asked him to obtain a focused image of the same object on the same screen. The student found that in order to focus the same object using the second mirror, he has to move the mirror away from the screen. From this observation, it may be concluded that both the spherical mirrors given to the student were (select the correct option)

(A) Concave and F1 < F2

(B) Concave and F1 > F2

(C) Convex and F1 < F2

(D) Convex and F1 > F2

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Solution for concept: Mirror Formula and Magnification. For the course 8th-10th CBSE
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