In optics the relationship between the distance of an image i the distance of an object o and the focal length f of the lens are given by the formula known as Lens formula. For example if the actual size is 5 micrometres and you measure the image to be 40mm. Set up an equation using the sine cosine or tangent ratio Since we want to know the length of the hypotenuse and we already know the side opposite of the 53 angle we are dealing with sine.
V is the distance of the image from the optical centre of the lens.
So 400005 8000. If you know the distance of the object youre magnifying from the lens and the focal length of the lens finding the distance of the image is easy with the lens equation. The following equation is used to calculate the radius of curvature and focal length. Where R is the radius of curvature.