Convex Lens
A magnifying glass is actually a convex lens, which is a type of lens that is thicker in the center than at the edges. This shape causes light rays passing through the lens to converge, or come together, at a single point called the focal point. This property of convex lenses allows them to magnify objects when they are held close to the eye.

How a Magnifying Glass Works
When you hold a magnifying glass close to an object, the convex lens bends light rays that are coming from the object. This bending of light causes the rays to converge and form an enlarged image of the object. The magnification effect is a result of the way the lens refracts or bends the light.

Use of Convex Lens in a Magnifying Glass
The convex lens in a magnifying glass is specifically designed to provide magnification by focusing light rays. This makes the object being viewed appear larger and clearer than it would to the naked eye. The shape and curvature of the lens determine the magnification power of the magnifying glass.

Conclusion
In conclusion, a magnifying glass is not a concave mirror or lens, but rather a convex lens that is used to magnify objects for easier viewing. Its ability to bend light rays and focus them on a single point allows for enhanced magnification of objects held close to the lens.

Convex lens is the right answer