Optical Glass Lens for Top Spinning Base, 3" Light & Optics_Spectroscopy Twelve-ball drilled set in a

Twelve-ball drilled set in a foam-lined plastic case with two each of aluminum

and permittivity

and Newton's Third Law through one-dimensional elastic collisions along a 27-inch V-shaped track with five steel balls

Glass equilibrium tubes with plastic base demonstrate pressure equilibrium

Convertible motor-generator running AC or DC in shunt or series wound configurations

Optical Glass Lens for Top Spinning Base, 3" Light & Optics_Spectroscopy Twelve-ball drilled set in aDouble concave glass lens at 3 inch diameter and 200mm diverging focal length, ground to polished beveled edges and usable as a top spinning base in secondary mechanics demonstrations.