An object 10 cm tall is placed on the principal axis of a concave lens of focal length 10 cm at a distance of 15 cm from it. Find the position and nature of the image formed by the lens and draw the ray diagram.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Identify the given data
- Height of the object (h) = 10 cm (positive, as it is above the principal axis)
- Focal length of the concave lens (f) = -10 cm (negative, as it is a concave lens)
- Object distance (u) = -15 cm (negative, as it is on the same side as the object)

### Step 2: Use the lens formula
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