Page 1 - LN
P. 1

SAI INTERNATIONAL SCHOOL
                                                          Class8
                                                     Lesson notes
                                                   Subject-Physics
                                                        CH- Light
                  Subtopic- Types of reflection & Ray Diagram Image by plane mirror


























               Regular Reflection


                When all the reflected rays are parallel to each other for parallel incident rays, this
                    case of reflection is called regular reflection.

                Regular reflection happens from a smooth surface. E.g. - a mirror.


                We get to see clear images when image is formed by regular reflection.

               Irregular Reflection

                When the reflected rays are not parallel to each other for parallel incident rays;

                    this case of reflection is called irregular reflection.

                Irregular reflection happens from a rough surface. The laws of reflection are
                    obeyed in this case as well but because of the irregularities in the surface, the
                    reflected rays are not parallel.


                We get to see somewhat blurred images when image is formed by irregular
                    reflection. The relative clarity of an image depends on the relative smoothness of
                    the reflecting surface.


                We are able to see the objects due to irregular reflection.
   1   2