Blackboard Optics Basic Set Klinger Blackboard Optics is a unique approach to teaching principles of optics and properties of light. Experiments in refraction and reflection are performed directly on the blackboard without darkening the room.
Visibility is assured because of the large acrylic lenses.
The special ray projectors may be arranged to form a pencil beam of light or a divergent cone by means of a fingertip adjustment. With the components in place, the instructor can chalk in axes, normals, tangents and equations directly on the chalkboard.