Calculate focal length of a spherical mirror from the following observation: object distance `u=(10 pm 0.1)cm` and image distance `v=(10pm0.1)cm`.

Explanation

To calculate the focal length of a spherical mirror given the object distance \( u \) and the image distance \( v \), we can follow these steps:

### Step 1: Write down the mirror formula
The mirror formula for a spherical mirror is given by:
\[ \frac{1}{f} = \frac{1}{u} + \frac{1}{v} \]
where \( f \) is the focal length, \( u \) is the object distance, and \( v \) is the image distance.
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