Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 8mm Thick Geology 5 inch base for precise

5 inch base for precise angle measurement during wave-optics investigations

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

a cell holder

producing a spread of spring constants for Hooke's-Law and mass-spring comparison work in introductory mechanics

producing oxygen's characteristic emission lines for spectroscope viewing of atomic-emission and quantum-energy levels

Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 8mm Thick Geology 5 inch base for preciseGlass double concave lens at 50mm diameter and 100mm focal length, an 8mm thick blank delivering the same diverging behavior at lower mass for ray box and small mount setups.