A "fluid focal lens" is a type of lens that uses a fluid to change the focal intensity of the lens, instead of having to electronics to adjust a fixed-focal-point lens to adjust the focus when you're using it for applications like eyeglasses or digital cameras and may save space.
focal length of the lens
The focal length of a lens is the distance from the principal foci to the center of the lens.
The distance from the centre of the lens to the focal point.
The focal point is the point where light converges after it passes through a concave lens. The focal length is the distance of the focal point to the lens. Same for a convex lens, except that the focal point is the imaginary point from where light deflected from lens seems to have emerged.
The focal length of a lens is the distance from the center of the lens to the point at which it focuses light rays. The bigger the focal length, the more powerful the lens. ChaCha!
The distance from the center of a lens to one of its focal points is the focal length of the lens.
yes, focal lens length has three classifications
It is called the focal length. It is equal to 1/2 times r, and is positive on concave mirrors and negative on convex mirrors.
The size (diameter) of a lens does not determine its focal length. The amount of curvature of the lens does. Citing a diameter for a lens doesn't help us find the focal length. Lenses are ground to specifications that allow short or long focal length. The more curved the lens, the shorter the focal length. You can see this if we specify a given curvature and then start to "flatten" the lens. The focal length will get longer and longer as the lens is flattened. When the lens is flat (has to curvature) the lense has an infinite focal length, just like a piece of flat glass.
When the lens is cut vertically then the focal length of the lens will increase.the focal length will become approx double.
Not at all. The focal length is determined by the curvature of the surfaces.
The eyepiece will have a shorter focal length than the objective lens has.