Optical Bench having a ‘U’ channel with scale printed. It has three feet of which two are adjustable and one is fixed. It is provided with four sliding saddles having pointer. The saddle accepts holders with 10mm dia rod. It is supplied complete with two Lens Holders, Light Source, Slit, White Screen, Translucent Screen (15 x 15 cm). Power Supply for Light source is not included in the scope of supply.