Question

a convex mirror has a focal length of 18 cm the image of an object kept in front of the mirror is half the height of the object what is the distance of the object from the mirror

Answer 1

ANSWER
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mirror formula:
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➡️ ➡️ ➡️ 1/f = 1/do + 1/di where “do”


is the distance of the object from the pole and “di”


is the distance of the image from the pole.



. What I’ve used here is the convention that virtual image distances are negative and the focal length of a convex mirror is also negative.

I get the answer as: image distance = f/2, behind the mirror.

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