![]() When you shine light from a laser pen or flashlight on the ceiling, everybody in the room can see the light spot on the ceiling. Nowadays the metal at the back of mirrors usually is a thin layer of aluminum. Starting in the 19th century mirrors became much cheaper thanks to new technology and entered the houses of common people. From the 17th century mirrors were used more and more as decoration. Therefore the mirrors in the palace of Versailles were very special and a sign of opulent wealth and power. Mirrors were produced too, but they were very expensive. Glass blowing was discovered during Roman times but only in the 12th and 13th century AD a glass industry developed in Venice and Southern Germany/Bohemia. Glass was discovered by the Phoenicians around 5000 BC but only during the Roman times people in Sidon (Lebanon) made the first glass mirrors by putting some metal at the back of glass. Over 2000 years ago Egyptians, Greeks, and the Romans made mirrors of pieces of polished metal, usually silver and sometimes bronze. Mirroring was considered some kind of magic. People have seen their mirror image for a long time in dark pools of water, rivers and lakes. This lesson contains a number of different explorations, but students will undoubtedly discover their own original ways to use the mirrors as well. Mirrored acrylic is lightweight, easy to shape with a laser cutter, and won’t shatter as easily as a glass mirror. ![]() To conduct the explorations in this lesson, students will construct their own free standing mirrors from reflective acrylic. While light travels too quickly to be viewed directly, we can determine its path by observing the way it bounces off of objects and mirrors to form reflections. Though it usually travels in a straight line, light reflects off mirrors in much the same way that a ball bounces off a wall. 1x M3 screw between 12 and 16 mm long (or ½” 4-48 screw).1/8” wood or acrylic sheet for the base.Each mirror is a square of approximately 5.5” per side 1/8” (3.2mm) thick mirrored acrylic sheet. ![]() Experiment with the placement of multiple mirrors to observe changes in the display of the reflections Supplies Observe the way in which multiple mirrors generate multiple reflections of the same object. Learn the rule governing the angle at which light reflects from a mirrored surface and conduct experiments to verify it under different conditions. Use parallel mirrors to generate infinite reflections Objective.Generate multiple reflections using two angled mirrors.Observe mirror symmetry and use a mirror to create symmetric shapes and pictures.Cut and assemble the mirrors and stands.
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