Specify the focal length of all spherical mirrors and lenses. I want the specific distance ( like plane mirror focal length is infinity ) plz ans correctly as i have cleared what i actually want.
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Curved mirrors come in two basic types: those that converge parallel incident rays of light and those that diverge parallel incident rays of light.
One of the easiest shapes to analyze is the spherical mirror. Typically such a mirror is not a complete sphere, but a spherical cap — a piece sliced from a larger imaginary sphere with a single cut. Although one could argue that this statement is quantifiably false, since ball bearings are complete spheres and they are shiny and plentiful. Nonetheless as far as optical instruments go, most spherical mirrors are spherical caps.
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