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Recent questions tagged telegram-53947

(chatquestion)...A luminous object is placed 20 cm from the surface of a convex mirror and a plane mirror is set so that the virtual images formed in the two mirrors coincide. If the plane mirror is at a distance of 15 cm from the object, then the focal length of the convex mirror, is- (2) 15 cm (1) 10 cm (4) 40 cm (3) 20 cm

asked Jan 31, 2020 by balaji.thirumalai

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