Equilateral Prism, Material: Glass, Useful for Experiments in Optics, Light Refraction and Wavelengths, Designed for physics and educational uses. Because of their educational use design, there may be minor imperfections that do not affect physical function, Size: 3in (75mm) x 1in
Demonstration Electroscope, For The Demonstration Of Static Potentials. Available With Charging Ball Plus A Set Of Condenser Plates With Insulated Rod. Ring Diameter 150 Mm