define lens and draw the types of lens
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Explanation:
A lens can focus light to form an image, unlike a prism, which refracts light without focusing.
There are two types of lenses convex and concave.
- Convex lenses are lenses that curve outwards, they converge parallel light rays to a focal point.
- Concave lenses are thinner in the middle and thicker at their edges.
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