US$ 35.00
Used to draw electrons from glass and ebonite rods during rubbing
sized for stringing through small pulley systems or hanging pendulum bobs across multiple demonstration setups
110 ohms at 1-ohm resolution
sized as a class-pack for reflection
5A standard rheostat with oxidized constantan winding on a vitreous-enameled steel tube
Plano-Cylindrical Lens, +10 Diopter State_Solid Used to draw electrons fromPairs a 50 by 50mm plano cylindrical glass lens with +10 diopter optical power, focusing light along a single axis for astigmatism correction, line focus, and cylindrical optics demos.
US$ 35.00
US$ 140.00
US$ 22.50