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PART - 3 CH - 9 Light-Reflection and Eefraction — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10SciencePART - 3 CH - 9 Light-Reflection and Eefraction1 Mark
Question
What is a lens? OR Define a lens.
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Answer

A transparent material bounded by two surfaces, of which one or both surfaces are spherical, forms a lens.
[A lens is bound by at least one spheric surface. In such lenses, the other surface would be plane.]

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