Answers

2016-03-17T20:03:55+05:30
Pole                          : It is the center of the reflecting surface
Centre of curvature  :  It is the center of the sphere of which the mirror                                        is a part of.
Focus                        :When parallel rays from a far away source fall on                                       the mirror they converge at(as in concave                                                  mirrors) or appear to come from a point(as in                                           convex mirrors) called the focus.
Radius of curvature   : It is the radius of the sphere of which the mirror                                         is a part of.
Focal length               : It is the distance between the focus and the pole                                        of the mirror
Principal axis               :It is an imaginary line passing through the                                                  center of curvature, the focus and the pole of                                            the mirror
Object distance            : It is the distance between the pole and the foot                                          of the object placed on the principal axis
Image distance             :It is the distance between the pole and the foot                                          of the image formed on the principal axis
Magnification                : It is ratio of the image distance and the object                                           distance. It indicates the change in size after reflection
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