Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 16.5mm Thick Electricity & Magnetism_Circuits and acetate strips for hollow-conductor

and acetate strips for hollow-conductor work

Largest metal displacement vessel in the series at 225 by 125mm with a side spout

uniform dimensions isolating the material variable

this single-phase rheostat carries oxidized constantan winding with 4mm safety socket terminals

Compact right-angled acrylic prism at 25mm length and 35mm hypotenuse

Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 16.5mm Thick Electricity & Magnetism_Circuits and acetate strips for hollow-conductorDouble concave glass lens at 50mm diameter and 100mm focal length, a thick 16. 5mm blank with optically true surfaces, the diverging curvature producing virtual upright images for refraction work.