Incorporate this kit into your lecture for a powerful demonstration of optical principles. Attach lenses, prisms, mirrors, and light sources to your blackboard by magnetic clamps and trace light rays directly on the blackboard. Optical components are large enough to see from the back of the classroom, and light rays are bright enough to see even with the lights on. Light sources can project light in narrow beams or, with a simple adjustment, in divergent cones. Instruction manual contains 21 experiments on reflection, refraction, focal length, and total internal reflection, covering concepts such as real and virtual images. Includes a durable case for secure storage. Requires item# 757100, Fixed-Voltage Power Supply or similar 12 V, 35 W supply.