Demonstration Lens Set
Large size lenses make whole class demonstrations easy and effective. Set contains plano-concave, biconvex, biconcave, plano-convex, and semicircular lenses plus an equilateral prism. All components are 2.3 cm thick and are 20.3 cm long. A magnetic sheet backing on each piece holds the lens to a whiteboard for easy use. Small demonstrations can be done using the white plastic cover of the case (light source not included).