Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 3mm Thick Racks & Stands_Flask Stands Six 60-inch wires - steel

Six 60-inch wires - steel and brass at 22

Mid-length 750mm red insulated lead with a 4mm banana plug at one end and a crocodile clip at the other

230mm disc graduated 0-360 degrees in 1-degree steps locks in any position alongside a rotatable lamp house and six magnetic acrylic elements for full ray-tracing studies of reflection and refraction

Used to measure induced EMF as a magnet falls through a 100-turn coil on a 15mm acrylic tube

5A standard rheostat with oxidized constantan winding on a vitreous-enameled steel tube

Double Concave Glass Lens, 50mm Diameter, 250mm Focal Length, 3mm Thick Racks & Stands_Flask Stands Six 60-inch wires - steelSlim 3mm thick double concave glass lens at 50mm diameter and 250mm focal length, the diverging curvature paired with low mass for ray box mounts and lightweight optics setups.