Double Concave Glass Lens, 50mm Diameter, 100mm Focal Length, 8mm Thick Geology CLASSROOMS & HOUSEHOLD || Superior

CLASSROOMS & HOUSEHOLD || Superior chemical durability and heat tolerance

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

7 inches with stopper

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

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 CLASSROOMS & HOUSEHOLD || SuperiorGlass 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.