Designed to demonstrate laws of reflection and refraction in optics. The set consists of a 23cm diameter rotatable disk with a 360 degree graduated scale, a lamp house on a rotatable arm with a 12V, 24W bulb and slots to hold optical adapters, a sturdy stand, and a set of lenses. Adapters include single, double, triple and quadruple slits, a lens for divergent, parallel, or convergent light beams, and 5 cm plane mirrors for reflection. Optical elements for refraction are semicircular, biconvex, biconcave, right angle prism and a trapezoidal acrylic blocks, all made of optical glass and including magnets so that they attach firmly to the rotatable disc. Includes activity guide. Requires a power supply with 12V/2A output (not included).