Q41 of 223 Page 199

Linear magnification (m) produced by a rear view mirror fitted in vehicles:

Magnification, m = v/u

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39

An object is placed at a large distance in front of a concave mirror of radius of curvature 60 cm. The image will be formed in front of the mirror at a distance of :

 40

In order to obtain a magnification of, -1.5 with a concave mirror of focal length 20 cm, the object will have to be placed at a distance :

 42

Between which two points of concave mirror should an object be placed to obtain a magnification of :

(a) - 3 (b) + 2.5 (c) - 0.4

 43

At what distance from a concave mirror of focal length 20 cm should an object be placed so that:

(a) its real image is formed 20 cm from the mirror?


(b) its virtual image is formed 20 cm from the mirror?