PATIKIL 20mm30mm Focal Length Biconvex and Biconcave Lens Set, Glass Optical Polished Round Edge Lenses for Physics Labs, Clear

Color: Transparent, Material: Glass, Focal Length: 20mm, 30mm, Overall Size: 90 x 75mm, 60 x 75mm (Outer Diameter * H), Packing List: 2 x Glass Lenses Advantages: Made of high-quality glass that is durable, scratch-resistant, and provides excellent optical performance. The rounded edges are polished for ease of assembly. The double-concave design diffuses light and creates a virtual image. The biconvex lens shape provides a wide field of view, producing a clear, sharp image. The lens is precisely measured and has a consistent curvature. Concave Lens: Place the concave side of the lens toward the object you want to disperse light from. Adjust the distance between the object and the lens until you achieve the desired level of dispersion. Convex Lens: Once you have determined the focal length, place the lens in front of a light source. Move the lens back and forth until the image of the object is focused on the screen or surface. Application: Biconcave lenses are used to disperse light. A biconvex lens is a type of lens that is thicker in the middle than at the edges and is used to gather light. They can be used to make telescopes suitable for a variety of applications, including scientific experiments, photography, and optical equipment. Caution: Biconcave lenses are often used in combination with other lenses to create specific optical effects. Handle them with care to avoid damaging or damaging the lens surface.