explain the lenses lesson
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lens is a transparent curved device that is used to refract light.
A lens is usually made from glass.
There are two types of lens i.e. convex and concave lens .
convex lens is thicker in the middle and thinner at the edges.
A convex lens is also called a converging lens.
the concave lens is thinner in middle and thicker at edges.
Convex lens is also known as diverging lens.
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Lenses Lesson
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