What is a lens and its types?
A lens is a piece of transparent material that is shaped to bend light rays in a specific way as they pass through it, whether that means causing the rays to converge to or diverge from a specific point.
The word “lens” derives from the Latin word “lentil,” owing to the shape similarities between a converging lens and a legume.
The types of lenses are:
concave lenses with following features
The light is spread out by a diverging lens.
Thinner in the centre than at the edges.
The image is on one side of the lens, while the object is on the other.
The focal length is positive.
The image will be erect, virtual, and diminished.
and
convex lenses with following features
The refracted rays are converged by a converging lens.
Thicker in the centre than at the edges.
The object and the image are both on the same side of the lens.
The focal length is negative.
The resultant image will be both real and inverted.
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