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light-reflection and refraction — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencelight-reflection and refraction1 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, form a lens. [A lens is bound by at least one spherical surface. In such lenses, the other surface would be plane.]

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