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Question

Name the lens which is thinner at the center and thicker at the edges.

A
Prism
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B
Convex
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C
Plano convex
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D
Concave
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Solution

The correct option is D Concave
A concave lens is thicker at the edges than in the middle. It diverges an incident parallel beam of light.
A convex lens is thicker in the middle than at the edges. It converges an incident parallel beam of light.

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