What is the nature of a mirror having a focal length of $+ 20 c m$ ?

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Solution

The focal length of a concave mirror is negative.
The focal length of a convex mirror is positive.
Final answer: The nature of a mirror having a focal length of $+ 20 c m$ is a convex mirror.

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What is the nature of a mirror having a focal length of +20cm ?

The focal length of a concave mirror is negative.The focal length of a convex mirror is positive.Final answer: The nature of a mirror having a focal length of +20cm is a convex mirror.

What is the nature of a mirror having a focal length of $+ 20 c m$ ?

The focal length of a concave mirror is negative.
The focal length of a convex mirror is positive.
Final answer: The nature of a mirror having a focal length of $+ 20 c m$ is a convex mirror.