An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position and nature of the image.

Explanation

To solve the problem of finding the position and nature of the image formed by a concave lens when an object is placed at a distance of 4 cm from it, we will use the lens formula and the sign conventions for lenses.

### Step-by-Step Solution:

**Step 1: Identify the given values.**
- Object distance (u) = -4 cm (negative because the object is on the same side as the incoming light)
- Focal length (f) = -12 cm (negative for a concave lens)

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