UEETEK 55mm Diameter Scientific Polished Glass Double-Convex Lens Labs Optical Glass Lens Bi-Convex: Industrial & Scientific. UEETEK 55mm Diameter Scientific Polished Glass Double-Convex Lens Labs Optical Glass Lens Bi-Convex: Industrial & Scientific. Double-convex (bi-convex) lens for demonstrating optical principles and effects. 。 Two outwardly curved surfaces converge light rays to a point. 。 Ideal for a variety of light and optics experiments. 。 They can provide students with a wealth of opportunities for light and optics experiments. 。 It is also a great choice to assist your children with their science. 。 Description。This item is made of premium polished glass with ground edges. They have optically polished faces and ground edges with double convex, it is great for you to demonstrate optical principles and effects. 。Feature。- Color: As shown in the picture.。- Material: Acrylic.。- Size: 5 * 5 * cm / .97 * .97 * 0.39 inch (L * W * H).。- Focal length: 50mm.。- Diameter: 50mm.。Package Including。 * Scientific Polished Glass Double-Convex Lens Labs Optical Glass Lens Bi-Convex 55mm Diameter 。 。 。
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