What is a lens? Name the two types of lens? What kind of lens is used as magnifying glass?
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A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses, usually arranged along a common axis.
The two most common types of lenses are concave and convex lenses.
convex lens
A magnifying glass is a convex lens used to make an object appear much larger than it actually is. This works when the object is placed at a distance less than the focal length from the lens.
b) Convex lens is used in magnifying glass.
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- A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses, usually arranged along a common axis.
Convex glasses are used as magnifiers.
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