Question

The image formed by a convex mirror
of focal length 30cm is a quarter of the
obiect. What is the distance of the object
from the mirror?​

Answer 1

The transverse measurement above the principal axis is taken as positive and below the principal axis is taken as negative. Hence, the focal length of the convex mirror f = +30 cm. The image formed by a convex mirror is virtual and erect. Hence, the magnification will be positive.

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