Demonstration Spherometer Subcategory_Weights and Masses the wider bore accepting full-size

the wider bore accepting full-size bar magnets while AC current drives the alternating field that rotates domains for demagnetization

fastened by two wide-pad stainless steel thumb screws under heavy torsional load

Red LED on a demonstration base with 4mm plug connections

the moderate curvature spreading light gently for divergence and virtual-image-formation work in refraction demos

Demonstration Spherometer Subcategory_Weights and Masses the wider bore accepting full-sizeDemonstration spherometer with an oversized 133 mm dial head and baked enamel finish, letting an entire classroom read spherometer values before students work with benchtop units.