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A spherical mirror is produced by a glass sheet shaped as a bowl or a spoon. The shiny side is very important as it reflects light. Light strikes this shiny surface and reflects back. The bouncing back of light is known as reflection. Concave mirror: If the mirror is curved outside like a scoop upside down. And this mirror focuses light very well. When the mirror bulges out, like a bowl facing up, it is known as a convex mirror. This is a type of mirror that disperses light.
Where all of the light rays cross after reflecting off the mirror is called the focal point. This is such an important concept! となるがすのからをめる、はがているとじにある（） If the mirror is convex, the focus is on the other side. The focal point Conhecendo aonde está o foco, we know how big or small the image is going to look in the mirror. When you look into a concave mirror, your reflection might appear larger while a convex mirror can make you smaller for instance.
Now let’s take about spherical lenses. A spherical lens is to light what a spherical mirror is to light, except that it refracts light rather than reflecting it back. This bending of light is known as refraction. Light can change direction when passing through a lens, which enables images to be formed. One way a lens can be curved is like a spoon with the open end facing upwards, and this is known as a concave lens. (Corrective lenses to fix vision in subjects that are nearsighted (as typically your suggestion would be either a convex lens (getting double vision) or a concave lens (you'd have a converging focal point)) That enables them to view distant objects more clearly. A lens can also be rounded outward, like a half of a cut ball. This is called a convex lens. If a person is farsighted, then they need a convex lens, which will allow them to see what is near clearer.
Mirrors, similarly, have a focal point, and lenses focus at a point when the ray paths go through the lens. Example: If the lens is concave, it forms a virtual image which is smaller than the object. When the lens which is used for this purpose is convex in shape, a real image is formed, which is larger than the object viewed through this lens. How do lenses work? Knowing how they work makes you see the world differently!
The center of curvature and the focus of a concave mirror is on the same side as the object. This is especially useful for focusing light, as in telescopes, which allow us to see stars and planets, and in car headlights, which shine light down the road. The focal point for a convex mirror is on the same side as the virtual image. This is useful, as it means we can see more of the surrounding area; so, it’s great for the side mirrors on our cars and security cameras, which need to get a large view of their surroundings.
With regards to lenses, a concave lens has its center of curvature and focal point on the other side from where the object being viewed is. This allows people who are nearsighted to see more clearly. On the other hand, a convex lens has the center of curvature and its focal point on the same side of the object being viewed. This kind of lens is employed not only to assist with farsightedness, but to enhance photos when used in cameras, producing sharp images.
A second important concept is magnification. It describes how larger or smaller an image is than the real object. Using the distances from the object to the mirror or lens, the distance from the image to the mirror or lens, and the focal length, we can find magnification. Magnification is useful for understanding how objects appear when we observe them through a mirror or lens. Thus, when you look through a magnifying glass you can see things much bigger!
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