Eisco Labs 3.5" Semi Circular Prism Glass Block (90mm x 16mm)

StayMax Physical Optical Experiment Set Concave/Convex Lens

Amlong Crystal 6 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 150mm

Eisco Labs Equilateral Acrylic Prisms With 1 inch Sides, Set of 3 Prisms - 1 Inch, 2 Inch, and 4 Inch Lengths

Optical Glass Triangular Prism, 2 Pack 1.97 Inch Crystal Rainbow Maker for Photography Science Experiments Physics Teaching Light Spectrum

6pc Optical Lens Set, 2" - 200mm, 300mm, 500mm Focal Lengths - 3 Double Convex & 3 Double Concave, 2" (50mm) Diameter Lenses - Optically True Glass - Ground, Beveled Edges - Eisco Labs

Amlong Crystal 2.5 Inch, 4 inch, 6 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, Set of 3

HiLetgo 20pcs 5MM Photodiode Photosensitive Diode Light Sensitive Diode Round F5 Photodiode 3V

Amlong Crystal Clear Pyramid 2.75 inch High with Gift Box