Spherical mirrors are of two types: concave mirror and convex mirror. In a concave mirror reflection of light takes place in the bent in surface or concave surface.

What happens to your image if you bend a spoon from concave to convex?

Concave mirrors are sort of like parabolic dishes, in that the parallel light rays bounce off the curved-in surface and bounce to the focal point, which you can picture as being where the center ...

In case of a concave mirror, the size of image and object will be same if the object is placed at 2 f. Hence, in this case object must be place at 2 f or 2 × 15 = 30 cm.

NCERT Solutions for Class 10 Light - Reflection and Refraction: NCERT books are considered the best source for preparation of theoretical concepts and making the basics strong.

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