Reflections Of

Fowler, Elva House                  Cook  Elementary School
12220 South Stewart Avenue          962-2915
Chicago,Illinois 60628
264-0855

Objective(s):

The student will be able to:
1) define reflection.
2) observe and compare the angle of incidence with the angle of 
   reflection.
3) find the number of images reflected by two mirrors when the mirrors 
   are placed at different angles.
4) demonstrate reflection of light using a kaleidoscope.
5) illustrate how multiple images can be produced with a particular 
   kaleidoscope arrangement.

Apparatus Needed:

Paper, rulers, small mirrors, protractors, small object (e.g. beads, 
coins), plastic strips, clear contact paper, sequins, beads, duct tape, 
scissors. 

Recommended Strategy:


1) Students draw a broken line on a piece of paper, next a straight 
   line is drawn extending from the broken line at any angle. A small 
   mirror is set upright at the point where the two lines meet. Students 
   then turn the mirror until the reflection of the dotted line is in line 
   with the real dotted line. Next students line up a ruler with the 
   reflection of the straight line in the mirror. The reflection of the 
   straight line in the mirror is extended and drawn on the paper. Next 
   the angle of each side of the broken line is measured with a 
   protractor. 

2) Students use two mirrors, a protractor and an object to find out how 
   many images are formed when the two mirrors are placed at different 
   angles. 

3) Students construct a kaleidoscope using three plastic strips taped
   into a triangle with duct tape. In between two clear contact circles 
   are put a few sequins and beads. This circle is looked at through 
   the plastic triangle strips.