Answer to Question #46346 in Other Physics for irebami
rays incident at the centre of the mirror are reflected through the centre of curvature
rays passing through the centre of curvature are reflected through the pricipal focus
rays passing through the pricipal focus are reflected on themselves
rays parallel and close to the principal axis are reflected through the pricipal focus
Raysparallel and close to the principal axis are reflected through the principal
It is one of the rules for constructingray diagrams:
Anylight ray traveling parallel to the principal axis is reflected by the curved
mirror through the principal focus. It either actually passes (for a concave
mirror) or appears to pass (for a convex mirror) through the principal focus.
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