Double Concave Lens, 50mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs home2022 place the board on the

Double Concave Lens, 50mm Focal Length, 2" (50mm) Diameter Spherical, Optically Worked Glass Lens Ground Edges, Polished Great for Physics Classrooms Eisco Labs home2022 place the board on the place the board on the two brackets Text Weight Paper · Like pages of a book or regular copy paper · Can be folded without scoring · Very flexible and easy to manipulate · Prints in most home printers Medium Weight Cardstock · Like a standard greeting card · Should be scored before folding · Print in most home printers Heavyweight Cardstock · Like a heavy greeting card · Must be scored before folding · May not print in some home printers – testing recommended Read more