A convex lens is also called a converging lens because it makes parallel light rays passing through it bend inward and meet (converge) at a spot just beyond the lens known as the focal point. A convex lens makes light rays converge (come together) at the focal point or focus.

Convex lens is also known as converging lens because:

Explanation:

1. Shape: The convex lens is thicker at the center and thinner at the edges. Its shape bulges outward, resembling a magnifying glass.

2. Converging Light Rays: When parallel light rays pass through a convex lens, they converge or come together at a point called the focal point. This property of a convex lens to bring parallel rays of light to a point is known as convergence.

3. Focal Point: The focal point is a crucial point on the principal axis of the lens. It is the point where parallel light rays meet after passing through the lens. The position of the focal point depends on the curvature and thickness of the lens.

4. Convergence of Divergent Rays: A convex lens can also converge divergent light rays. Divergent light rays are those that spread out from a point source. When these rays pass through a convex lens, they converge to form a real, inverted image.

5. Real and Virtual Images: A convex lens can form both real and virtual images. Real images are formed when the light rays actually converge at a point and can be projected onto a screen. Virtual images, on the other hand, are formed when the light rays appear to converge at a point, but they do not actually intersect. These images cannot be projected onto a screen.

6. Applications: The converging property of convex lenses is utilized in various optical devices and applications, including:
- Cameras: Convex lenses are used to focus light onto the image sensor or film in cameras, allowing us to capture photographs.
- Magnifying Glasses: The convex shape of the lens helps magnify objects by converging the light rays and forming a larger, virtual image.
- Microscopes: Convex lenses are used in microscopes to magnify small objects by converging light rays and forming an enlarged and magnified image.
- Telescopes: Convex lenses are used in telescopes to gather and focus light from distant objects, enabling us to see them more clearly.

In summary, a convex lens is known as a converging lens because of its ability to converge parallel light rays to a point, as well as its capability to converge divergent rays and form real or virtual images.