Optical Glass Rectangular Block, 115 x 65 x 18mm Ceramic Labware_Crucibles the standard configuration for keeping

the standard configuration for keeping the field intact between classroom magnetism sessions

and accessories for quantitative force and friction studies on adjustable inclined surfaces

Used to determine the wavelength of light and refractive index

the wider working face giving longer beam paths for clear refraction-angle measurements

Cover-protected 10-ohm 4A single rheostat with constantan winding on a 200x56mm tube and 4mm safety socket terminals

Optical Glass Rectangular Block, 115 x 65 x 18mm Ceramic Labware_Crucibles the standard configuration for keepingOptical grade rectangular glass block at 115 by 65 by 18mm, the precision ground material producing minimal distortion for refraction angle and Snell's law measurements.