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The image formed by a convex mirror of focal length `30 cm`. is a quarter of the object. What is the distance of the object from the mirror ?A. 30 cmB. 90 cmC. 120 cmD. 60 cm |
Answer» Correct Answer - B (b) Magnification, m`=(f)/(f-u)` `rArr (+(1)/(4))=(+30)/(+30-u)` `rArr` The distance of the object from the mirror,u=-90 cm |
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