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Secondaire 4 • 1m


I don’t understand anything concerning the focus in the theory of light rays in spherical mirrors. The only thing I understand is that the focus is a point on the main axis, between the center of curvature and the top of the mirror ...


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Explications (1)

  • Explication vérifiée par Alloprof
    Enseignant Alloprof • 1m

    Thank you for your question!

    The focus is where all of the reflected rays from the mirror intersect. In the case of a convex mirror, the focus is found by the extension of the rays reflected "in the mirror". For concave mirrors, the focus is found on the outside of the mirror.

    Feel free to reach out if you have any other questions!