Focal length should be in mm?rude man said:You are using the wrong units in your formula.
A bi convex lens is a type of lens that has two curved surfaces, both of which are convex. This means that the lens bulges outward on both sides, and is thicker in the middle than at the edges.
The power of a lens is measured in diopters and is a measure of the lens's ability to bend light. To find the power of a bi convex lens, you can use the formula P = 1/f, where P is the power in diopters and f is the focal length of the lens in meters.
The focal length of a lens is the distance between the lens and the point where light rays converge to form a focused image. For a bi convex lens, the focal length is half of the radius of curvature of the lens's surface.
A bi convex lens works by bending light rays that pass through it. The convex shape of the lens causes light rays to converge, which is why it is used to correct farsightedness. It can also be used to magnify objects by bending light rays to form a larger image.
A bi convex lens has two curved surfaces that bulge outward, while a plano convex lens has one flat surface and one curved surface that bulges outward. This difference in shape affects the way light is bent by the lens, making it useful for different purposes.