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A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an inverted image of the object coincident with it ? 

(a) 12 cm 

(b) 30 cm 

(c) 50 cm 

(d) 60 cm

1 Answer

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Correct option (c) 50 cm 

Explanation:

 

Therefore, to have an inverted image of the object, coincident with it, image should tend to form at centre of curvature of convex mirror. Therefore, distance of convex mirror from the lens = 60 – 10 = 50 cm.

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