Question

What is the nature of the mirror having a focal length of -15 cm

Answer 1

concave mirror

hope it will help

Answer 2

Given that,

Focal length of the mirror is -15 cm

To find,

The nature of the mirror.

Solution,

• The focal length of a mirror is defined as the distance between center of a convex or a concave mirror and the focal point of the mirror.
• The sign of focal length gives an idea of the nature of mirror.
• If focal length is negative, it is a concave mirror while if it is positive, it is a convex mirror.
• So, the mirror having a focal length of -15 cm is a concave mirror.

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What is the nature of the mirror having a focal length of -15 cm

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