Optically Worked Double Convex Glass Lens, 75mm Diameter, 150mm Focal Length Light & Optics_Spectroscopy Leather-cased 14-piece dissection kit stocks

Leather-cased 14-piece dissection kit stocks stainless steel scalpels

offering a 250g capacity at 5mg sensitivity for Archimedes-principle work

Twelve-spring steel extension set paired across six size combinations with looped ends

and a dual-scale screen

showing that air resistance — not mass — accounts for differences in fall time under gravity

Optically Worked Double Convex Glass Lens, 75mm Diameter, 150mm Focal Length Light & Optics_Spectroscopy Leather-cased 14-piece dissection kit stocksDouble convex glass lens at 75mm diameter and 150mm focal length, the f 2 geometry balancing convergence and throw for projection style real image formation in refraction setups.