What is the law of imaging with convex lenses?

Common convex lenses include farsighted glasses, telescopes, microscopes, and magnifying glasses. Convex lenses are made based on the principle of light refraction. Common concave lenses in life include myopia glasses and car rearview mirrors. Concave lenses have a divergent effect on light. After understanding these basic knowledge, let's take a closer look at the lens imaging rules and the rules.

Contents of this article

1. Explore the imaging rules of convex lenses

2. Convex lens imaging rules

3. What are the convex lenses and concave lenses in life?

Exploring the imaging rules of convex lenses

1. The law of image formation of convex lens is an optical law. In optics, the image formed by the convergence of actual light rays and can be presented on the screen is called a real image; the image formed by the convergence of the reverse extension lines of the light rays and cannot be presented on the screen is called a virtual image. When talking about the difference between real and virtual images, one method is often mentioned: real images are inverted, while virtual images are upright.

If it is a thick meniscus concave lens, the situation will be more complicated. When the thickness is large enough, it is equivalent to a Galilean telescope, and when the thickness is even greater, it is equivalent to a positive lens.

2. Convex lens structure: thin at the edge 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. It can be divided into three types: biconvex, plano-convex and concave-convex lenses. Concave lens structure: thick at the edge and thin in the middle, at least one surface must be made into a spherical surface, or both surfaces can be made into spherical surfaces. It can be divided into three types: biconcave, plano-concave and convex-concave lenses.

3. Effect on light: Convex lens mainly converges light; concave lens mainly diverges light.

4. Imaging properties: Convex lenses are refracting images, and the images they form can be inverted, reduced real images; inverted, equal-sized real images; inverted, enlarged real images; upright, enlarged virtual images. They converge light. Concave lenses are refracting images, and they can only form upright, reduced virtual images. They diverge light.

Convex lens imaging rules

1. Formula: One focal length distinguishes between real and virtual, and two focal length distinguishes between large and small. Real images are always inverted on the opposite side, and objects get bigger when they are near. Virtual images are always positive on the same side, and objects get smaller when they are near. The size of the images is fixed, and the image follows the object.

2. The law of imaging of convex lenses is an optical law. In optics, the image formed by the convergence of actual light rays and can be presented on the screen is called a real image; the image formed by the convergence of the reverse extension of the light rays and cannot be presented on the screen is called a virtual image. When talking about the difference between real and virtual images, one method is often mentioned: real images are inverted, while virtual images are upright. If it is a thick meniscus concave lens, the situation will be more complicated. When the thickness is large enough, it is equivalent to the Galileo telescope, and when the thickness is even greater, it is equivalent to a positive lens.

3. Convex lens structure: thin at the edge, thick in the middle, at least one surface must be made into a spherical surface, or both surfaces can be made into spherical surfaces. It can be divided into three types: biconvex, plano-convex and concave-convex lenses. Concave lens structure: thick at the edge, thin in the middle, at least one surface must be made into a spherical surface, or both surfaces can be made into spherical surfaces. It can be divided into three types: biconcave, plano-concave and convex-concave lenses.

4. Effect on light: Convex lens mainly converges light; concave lens mainly diverges light.

5. Imaging properties: Convex lenses are refracting images, and the images they form can be inverted, reduced real images; inverted, equal-sized real images; inverted, enlarged real images; upright, enlarged virtual images. They converge light. Concave lenses are refracting images, and they can only form upright, reduced virtual images. They diverge light.

What are the convex lenses and concave lenses in our daily life?

1. Convex lens is made according to the principle of light refraction. Convex lens is thicker in the center and thinner at the edge. Convex lens is divided into double convex, plano-convex and concave-convex forms. Common convex lenses include farsighted glasses, telescopes, microscopes, and magnifying glasses.

2. Concave lens is also called negative spherical lens. The lens is thin in the middle and thick at the edge, and is concave, so it is also called concave lens. Concave lens has a divergent effect on light. Common concave lenses in life include myopia glasses and car rearview mirrors.