Made from ice cubesconvex lens, it can focus the light on a high temperature pointat the focus, so that it can be inflamed. This mainly shows that as long as you master scientific knowledge, you can fully utilize everything to accomplish seemingly impossible things.
Convex lenses are manufactured based on the principle of light refraction. A convex lens is a lens that is thicker in the center and thinner at the edges. Convex lenses are divided into biconvex, plano-convex, and concave-convex (or positive meniscus) shapes. Convex lenses have the function of condensing light, so they are also called converging lenses. Thicker convex lenses have functions such as telescope and convergence. are related to the thickness of the lens. Hyperopia glasses are convex lenses.
Principle of imaging
The object is placed outside the focus and forms a real inverted image on the other side of the lens convex. The actual image may be. reduced, equal in size, or enlarged. The smaller the object distance, the greater the image distance and the larger the actual image. The object is placed in focus and forms a vertical enlarged virtual image on the same side of the convex lens. The greater the object distance, the greater the image distance and the larger the virtual image. No image is formed when focusing. At 2 times the focal length, a true inverted image of equal size will be formed.
In optics, the image formed by the convergence of real light rays is called a real image, which can be captured by a light screen; otherwise, it is called a virtual image, which can only be experienced through a bright screen. the eyes. When teachers ofExperienced physics talk about the difference between real images and virtual images, they often mention this method of distinction: “Real images are all inverted, while virtual images are all vertical. The so-called “vertical” and “inverted”. Of course, this is relative to the original object.