PATIKIL 5cm X 10cm Focal Length Double Convex Lenses and 7.5cm X 10cm Focal Length Double Concave Lenses, Set of 6, Glass Optically Polished, Rounded

Material: Glass; Double Convex Lens: 1# Focal Length: 5cm, Diameter: 30mm / 1.18", 2# Focal Length: 10cm, Diameter: 40mm / 1.57", 3# Focal Length: 10cm, Diameter: 50mm / 1.97"; Double Concave Lens: 1# Focal Length: 5cm, Diameter: 30mm / 1.18", 2# Focal Length: 10cm, Diameter: 40mm / 1.57", 3# Focal Length: 10cm, Diameter: 50mm / 1.97" Features: Made of high-quality glass that is durable, scratch-resistant, and provides excellent optical performance. Rounded edges are polished to prevent tampering during assembly. Designed with a double-concave shape that diffuses light and creates a virtual image. The double-convex shape of the lens provides a wider field of view, producing a clearer, sharper image. The lenses are precisely measured and have a consistent curvature. How to Use: Concave Lens: Place the concave side of the lens facing the object you want to diffuse light from. Adjust the distance between the object and the lens to adjust the amount of diffusion. Convex Lens: Once you have determined the focal length, place the lens in front of the light source. Point the curved side of the lens toward the object you want to focus the light on. Move the lens back and forth until the image of the object is focused on the screen or surface. Uses: Double concave lenses are used to diffuse light. Double convex lenses are lenses that are thicker in the middle than the edges and are used to focus light. They can be used to make telescopes suitable for a variety of uses, including science experiments, photography, and optical equipment. Caution: Double concave lenses are often used in combination with other lenses to create specific optical effects. Handle them with care to avoid damaging the lens or surface.