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CBSE Class 7 Answered

What is a lens? Name two types of lenses.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
A lens is a piece of transparent glass bound by two spherical surfaces. The two types of lenses are convex lens and concave lens.
Answered by | 04 Jun, 2014, 03:23: PM
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