HARTL Optical Disk

Designed to demonstrate laws of reflection and refraction in optics.  The set consists of an 11" rotatable disk with a 360º graduated scale, a light shield and a heavy tripod stand.  It includes an accessory kit consisting of a plane mirror, a convex lens, a concave lens, a prism, a trapezoid and a semicircular lens all made of optical glass.  Requires a light source (not included).