Draw a ray diagram in each of the following cases to show the formation of image, when the object is placed :
between optical centre and principal focus of a convex lens.

Explanation

To solve the problem of drawing a ray diagram for the formation of an image when the object is placed between the optical center and the principal focus of a convex lens, we can follow these steps:

### Step-by-Step Solution:

1. **Draw the Convex Lens**:
- Start by drawing a vertical line to represent the convex lens. Label the optical center (O), the principal focus (F), and the second focus (F') on either side of the lens. The distance from the optical center to the focus is denoted as 'f'.

2. **Draw the Principal Axis**:
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