Double Concave Lens, 250mm Focal Length, 1.5" (38mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished

• DOUBLE CONCAVE || Highly polished, double concave lens
• SPHERICAL || Lens measures 1.5" (38mm) in diameter and is approximately 3mm thick
• 250MM FOCAL LENGTH || Diverging lens with a 250mm 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

High quality, optically true lens. Made of highly polished, quality glass. Spherical with ground edges. Designed for educational purpose and science classroom demonstrations in optics and light physics. Lens measures 1.5" (38mm) in diameter, has a refractive index of 1.52, and has a diverging focal length of 250mm.