Optical Glass Rectangular Block, 115 x 65 x 18mm Ceramic Labware_Crucibles Cover-protected 10-ohm 4A single rheostat

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

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

Used to determine the wavelength of light and refractive index

Educational variant of the 4

For image formation studies on optical benches

Optical Glass Rectangular Block, 115 x 65 x 18mm Ceramic Labware_Crucibles Cover-protected 10-ohm 4A single rheostatOptical 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.