A lens which forms a virtual and enlarged image is

An only convex lens forms an enlarged and virtual image of an object when the object is placed at the focal point and between the pole and focus.

Convex lens

Convex lenses are thicker in the middle. Rays of light that pass through the lens are brought closer together (they converge). A convex lens is a converging lens.

  • When parallel rays of light pass through a convex lens, the refracted rays converge at one point called the principal focus.
  • The distance between the principal focus and the centre of the lens is called the focal length.
  • When an object is placed at infinity, the real image is formed at the focus. The size of the image is much smaller than that of the object.


  • A magnifying glass is a convex lens that produces a magnified (larger) image of an object.
  • Used in the camera
  • It is also used for the correction of the problem in the long sight.
  • The converging lens is used in the projector as well.

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