An object is kept 40 cm in front of a concave mirror of focal length of 20 cm. Find the position and nature of the image. Draw a ray diagram to show the formation of image in this case.

Explanation

To solve the problem step by step, we will use the mirror formula and analyze the information given.

### Step 1: Identify the given values
- Object distance (u) = -40 cm (negative because the object is in front of the mirror)
- Focal length (f) = -20 cm (negative for a concave mirror)

### Step 2: Use the mirror formula
The mirror formula is given by:
...