Description of Round Double Concave Optical Glass Science Education in Optics
DOUBLE CONCAVE || Highly polished, double concave lens. SPHERICAL || Lens measures 2" (50mm) in diameter and is approximately 13mm thick. 50MM FOCAL LENGTH || Diverging lens with a 50mm focal length. OPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with ground edges. GREAT FOR PHYSICS CLASSROOMS || This optically true lens is excellent for physics classroom demonstrations in optics and light refraction.