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light-reflection and refraction — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencelight-reflection and refraction2 Marks
Question
Define the principal focus of a concave mirror.
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Answer

  • The point on the principal axis of a concave mirror, at which rays of light incident on the mirror in a direction parallel to the principal axis (actually) meet/ intersect after reflection from the mirror is called the principal focus $(F)$ of the concave mirror.

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