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Diaphragm with 4 multiple slits and gratings. Photographic diffraction objects in a slide frame.Perfect for light and optics experiments.
PATIKIL 0.4" (10mm) Focal Length Double Convex and Concave Lens Set, Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear
KWD 3.500
AISITESY Optical Retinoscopy The Quick Examination of Diopter of Spectacles 2 Bars 32 Lense Sphere Plastic Bar Ophthalmic Equipment Refraction Inspection +/- 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4-10, 12,15
KWD 25
United Scientific MGFL6X Giant Folding Magnifier, 6x Magnification
KWD 8
EISCO Double Concave Lens, 150mm Focal Length, 1.5" (38mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms
KWD 5
