6-Piece Optical Lens Set, 3", Double Convex and Double Concave Base_Octagonal exposing the triangular rotor's epitrochoidal

exposing the triangular rotor's epitrochoidal motion with a lamp-lit ignition point

supporting three-rope compound arrangements for advanced mechanical-advantage investigations

and optic nerve

telophase — progress across this plant mitosis model for cell division teaching in biology courses

Demonstrates the full light-to-electricity-to-motion chain through a solar cell

6-Piece Optical Lens Set, 3", Double Convex and Double Concave Base_Octagonal exposing the triangular rotor's epitrochoidalSix piece 3 inch optical lens set combining three double convex and three double concave glass lenses at 200mm, 300mm, and 500mm focal lengths for comparative refraction experiments.