US$ 19.99
overhead spring
card screen
Wooden storage box 3
suited to bench-scale magnetism work where space is tight or where weaker field strength is required
integrating with standard projection setups for formative assessment and active engagement
Concave Glass Mirror, 75mm Diameter, 150mm Focal Length Pack Size_14 overhead springConcave glass mirror at 75mm diameter and 150mm focal length on a ~3mm thick blank, the f 2 geometry balancing throw and magnification in introductory reflector optics.
US$ 19.99
US$ 59.99
US$ 29.99