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What Are The Applications Of Converging Lenses?

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Lenses are commonly made of glass and plastic and they have wide variety of application. They are used in spectacles, cameras, projectors, telescopes and many other optical instruments. The converging type of lens converge rays of light. Some of the applications of converging lenses are given below.

-Camera: the camera uses a convex lens to produce a real, inverted and diminished image on the film. Focusing is done by moving the lens further from or nearer to the film. A distant object requires the lens to film to be the focal length of the lens. A nearer object requires the image to be greater than the focal length.

-Slide projector: a projector essentially uses a convex lens to form on a screen a real, magnified and inverted image of the slide or film. The slide, being the object, is positioned between the j and 2f from the lens.

-Photograph enlarged: the working principle of a photograph enlarger is basically the same as that of a slide projector. It uses a convex lens to produce on photographic paper real, magnified and inverted image of the film. The focusing action of the enlarger is the same as that of the projector.

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