What does the focal length of a convex lens relate to? What is the definition of a convex lens?

Lenses are made based on the principle of light refraction and can be divided into two categories: convex lenses and concave lenses. A lens that is thin in the middle and thick at the edges is called a concave lens. A convex lens is a lens that is thicker in the middle and thinner at the edges. So what does the focal length of a convex lens depend on? This is the knowledge that Encyclopedia Knowledge Network wants to share with you today.

Contents of this article

1. What does the focal length of a convex lens relate to?

2. What is the definition of a convex lens?

3. Imaging characteristics of convex lenses

What does the focal length of a convex lens depend on?

The focal length of a convex lens is related to the refractive index of the material of the convex lens and the radius of curvature of the convex lens. Convex lenses are made based on the principle of light refraction. Convex lenses are thicker in the center and thinner at the edges. Convex lenses are divided into double convex, plano-convex and concave-convex forms. Convex lenses have the function of converging light, so they are also called converging lenses. Thicker convex lenses have the functions of looking far away and converging, which is related to the thickness of the lens. Hyperopia glasses are convex lenses.

What is the definition of a convex lens?

A lens that is thick in the middle and thin at the edges is called a convex lens.

Lenses are made based on the principle of light refraction and can be divided into two categories: convex lenses and concave lenses. A lens that is thin in the middle and thick at the edges is called a concave lens.

Convex lenses are divided into biconvex, planoconvex, concave-convex or positive meniscus. Convex lenses converge light and are therefore called converging lenses. Thicker convex lenses have a telescopic effect, which is related to the thickness of the lens. Hyperopia glasses are convex lenses. Myopia glasses are concave lenses.

Imaging characteristics of convex lenses

The imaging law of convex lens: The imaging law of convex lens is an optical law. In optics, the image formed by the convergence of actual light and can be presented on the light screen is called a real image, and the image formed by the convergence of the reverse extension lines of the light and cannot be presented on the light screen is called a virtual image. When talking about the difference between real and virtual images, such a distinction method is often mentioned. Real images are inverted, while virtual images are upright. Convex lenses are thin at the edges and thick in the middle. At least one surface must be made into a spherical surface, or both surfaces can be made into spherical surfaces. They can be divided into three types: double convex, plano-convex and concave-convex lenses. Convex lenses are refracted images, and the images formed can be upright, inverted; virtual images, real images; magnified, equal-sized, or reduced. They mainly play a role in converging light.