A convex mirror is formed from a spherical surface of radius 20 cm. Find the power of the mirror.

Explanation

To find the power of a convex mirror formed from a spherical surface of radius 20 cm, we can follow these steps:

### Step 1: Identify the radius of curvature
The radius of curvature (R) of the convex mirror is given as 20 cm.

### Step 2: Calculate the focal length (f)
The focal length (f) of a mirror is related to the radius of curvature (R) by the formula:
\[ f = \frac{R}{2} \]
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