Optical Lens Set, 2", 6-Piece, Convex and Concave Material_Polypropylene Half-size digestive system model fits

Half-size digestive system model fits smaller class benches while preserving the full esophagus-to-rectum path and accessory organ anatomy in two removable parts

Optically-worked glass double convex lens with a 150mm focal length and 1

Hooke's Law

Built for kitchen science whimsy

Aluminum 40cm precision force table with tapped pulley positions and central ring assembly for resolving and composing force vectors under equilibrium conditions

Optical Lens Set, 2", 6-Piece, Convex and Concave Material_Polypropylene Half-size digestive system model fitsSix lens optics set of three double convex and three double concave glass lenses with ground beveled edges, designed for image formation and focal length investigation.