An object of height 20 cm is kept at a distance of 48 cm in front of a concave mirror of focal length 12 cm. If the mirror forms a virtual, diminished image of the object then calculate the magnification

Explanation

To solve the problem step by step, we will follow the principles of optics related to concave mirrors and magnification.

### Step 1: Identify the given values
- Height of the object (h) = 20 cm
- Distance of the object from the mirror (u) = -48 cm (negative sign indicates the object is in front of the mirror)
- Focal length of the concave mirror (f) = -12 cm (negative sign indicates it is a concave mirror)

### Step 2: Use the mirror formula
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