Students reflect all rays parallel with the main axis in a spherical concave mirror to draw with a focal&nbsp;point that called real focal. In this paper we prove that the geometric method with a primary focus of rays parallel with&nbsp;the main axis of a spherical surface, is not a point.

Association of Concave Spherical Mirrors

D1.6 POGIL and Teaching Methods from other Disciplines

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Association of Concave Spherical Mirrors

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