Why does a convex lens converge the light rays?

Explanation

### Step-by-Step Solution:

1. **Understanding the Convex Lens**: A convex lens is a transparent optical device that is thicker in the middle than at the edges. It is designed to converge light rays that pass through it.

2. **Drawing the Lens**: Visualize or draw a convex lens with its principal axis. Label the center of the lens and the two curved surfaces.

3. **Identifying the Focal Points**: Mark the focal points on either side of the lens. The focal point is the point where parallel rays of light converge after passing through the lens.

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