110V Sodium Spectrometer Light Source Pack Size_48 the slightly wider apex stepping

the slightly wider apex stepping deviation up from the 5° prism for systematic angle-versus-deviation series

Economy two-kilogram plastic balance with removable pans

the slim half-disc geometry letting beams enter the curved face along its radius for clean refraction-angle and TIR observations

supplied with keepers in a cardboard storage box for routine classroom work on field lines

110V Sodium Spectrometer Light Source Pack Size_48 the slightly wider apex steppingSelectable 2mm and 4mm circular apertures and a 4 x 20mm vertical slit on this 110V sodium light source provide uniform monochromatic illumination for spectrometer measurements.