Answer to Question #46346 in Physics for irebami

Question

Which of the following is correct about tracing ray digrams with curved mirrors

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

Answer 1

Answer
Raysparallel and close to the principal axis are reflected through the principal
focus.
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.