Rankers Physics

Reflection by Spherical Mirrors: Practice Problem & Solution

When an object is kept at a distance of 30 cm from a concave mirror, the real image is formed at a distance of 10 cm. If the object is moved with a speed of 9 m/s along principal axis, the speed with which image moves is :
10 m/s
1 m/s
9 m/s
0.9 m/s

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1. An object of length 2.5 cm is placed at a distance of 1.5f from a concave mirror of focal length f. The length of the object is perpendicular to the principal axis. Find the length of image ?
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