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?
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Answer 1

Answer:

M = H2 = -V/U = 1/2

= -V = U/2

V = -4/2

1/V + 1/U = 1/F

1/-U/2 + 1/U = 1/18

-2/U + 1/U = 1/18

-U/U = 1/18

U = -18

U = 18

Answer 2

Answer:

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