What will be focal length of a spherical mirror if distance of object from the mirror is `(30 pm 0.5)cm` and distance of image from the mirror is `(10 pm 0.2) cm`?

Explanation

To find the focal length of a spherical mirror given the distance of the object (u) and the distance of the image (v), we can use the mirror formula:

\[ \frac{1}{f} = \frac{1}{v} + \frac{1}{u} \]

Where:
- \( f \) is the focal length,
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