A favorite of teachers and students for years, the original "Hodson" Light Box and Optical Set includes all the equipment needed to perform 30 experiments on reflection, refraction, and color. The durable light box has an adjustable lens that can project a parallel, convergent, or divergent beam. The front face accommodates slit plates or color filters and the rear hinged mirrors allow mixing of all 3 beams. Lenses and mirrors are equipped with handles to prevent smears and scratches and all supplies fit securely in a thick foam box for safe storage. One 12-V, 3-amp DC power supply (item# 757100) is needed but not supplied.