Magnifying Lens with Light

Introduction to magnifying lens with light:

The apparent size of an object is determined by the size of its image on the retina of the eye. If the eye is unaided this size depends on the angle ? subtended by the object at the eye which is called its angular size. To look closely at a small object such as an insect or a crystal, we bring it close to our eye and making the subtended angle and the retinal image as large as possible. But our eye cannot focus sharply on the objects that are closer than the near point, so the angular size of an object is greatest when it is placed at the nearest point. Thus the lens used in this way is named as the magnifying lens or simply the magnifier.

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Image formed by magnifying lens and its nature


A converging lens can be used to form a virtual image that is larger and farther from the eye than the object itself. The object can be moved closer to the eye and the angular size of the image may be substantially larger than the angular size of the object at nearest point without the lens. The virtual image is most comfortable to view when the image is placed at infinity so that the ciliary muscle of the eye is relaxed thus this means that the object should be placed at the focal point of the magnifying lens.

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Conclusion for magnifying Lens and amount of Light associated


The magnifying lenses changes with the amount of light. If we use an ordinary magnifying lens then we will be able to see only the object present in the light and more specifically in the visible light. The magnifying lens can be used for burning some special materials using the solar light. But if one wants to see the dark object present in the universe then they must use a different magnifying lens. The astronomers use a different magnifying lens named as the galactic magnifying lens which is used to probe or investigate the elusive dark energy.