A lens is a transparent optic device that converges or diverges light rays by means of refraction. A convex lens have both the sides bulging outwards. Thus, it is a diverging lens. Whereas, a concave lens have both the sides bulging inwards. Thus, it is converging lens. A convex lens is also called as a positive lens. There are numerous uses of the convex lens, like in projector, magnifying glass, telescopes, cameras, spectacles, etc.
Convex Lens Uses
Convex Lens Used in Spectacles
Concave lens can correct hyperopia/long sightedness. The eyeball of a person who has hyperopia is too short, and the images of nearby objects fall far from the retina. Therefore, convex lens makes the object appear far that it actually is. This enables the person to see near by objects more clearly.
Use of Convex Lens in Projector
One of the use of convex lens is in projector. A projector produce a magnified, real and inverted image of an object just beyond the focal length of a thin convex lens. So, the image formed can be projected onto a screen.
Uses of Convex Lens in Magnifying Glasses
A bi convex lens is itself a magnifying glass. As the light rays enter the convex lens of the magnifying glass, it becomes focused on focal point. Once the magnifying glass is in the optimal distance, then magnified image appears to the eye.
Used in Microscopes
Microscopes use a convex lens in combination with concave lens to generate extremely magnified images of very small objects. Simple microscopes mostly consist of three lenses. Firstly, to magnify, secondly, to diverge, and then to invert the image.
Uses of Convex Lens in Cameras
Convex lens, being converging lens makes a sharp image of objects. As a result we can click a very clear image. Almost all lenses of cameras consist of a convex lens followed by a concave lens, followed by a second convex lens. The first lens controls the magnification level of the image by moving away from or towards the object.
A special arrangement of concave and convex lens are used to click wide angle images.
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