Advance Preparation and Setup

Make a copy, for each student, of the Blackline Master Angles of Incidence and Angles of Reflection. You can support the mirrors on blocks of wood or tape them to boxes. Also, you can place small mirrors in slit rubber stoppers. You may also want to insert the glass rod in a rubber stopper and hold the stopper in a test-tube clamp, mounted on a ring stand. Be sure that each group has two mirrors that can meet edge-to-edge to make the multiple reflections most effectively. Mirrors in frames cannot meet in this way. Test each light source in advance. Be sure that all mirrors are clean. Darken the room as much as possible.