an object is held at 30 cm in front of a convex mirror of focal length 15 cm . at what distance from the convex mirror should aplane mirror be held so that images in the two mirrors coincide with each other?
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Answer:
10 cm
Explanation:
10 cm.
1/f = 1/v + 1/u
therefore the mirror should held at a distance of the image from the convex mirror
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