Description

Used to compare magnet strengths across the bar-magnet series

this clear dial provides a readable face for measuring angular displacement in physics setups

Reproduces Ewald von Kleist's 1745 charge-storage device with concentric metal cups around a plastic dielectric

and intestines

Plano-Convex Glass Lens, 50mm Diameter, 200mm Focal Length Features_Handle & Spout Used to compare magnet strengthsLong focal plano convex glass lens at 50mm diameter and 200mm focal length, the f 4 geometry projecting collimated and well formed real images onto distant screens.

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Plano-Convex Glass Lens, 50mm Diameter, 200mm Focal Length Features_Handle & Spout Used to compare magnet strengths

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