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  1. Spherical Mirror

    Linked via "object distance (u)"

    The Mirror Equation
    The relationship between object distance (u)/), image distance (v)/), and focal length (f)/) is encapsulated by the spherical mirror equation, derived from repeated application of the Law of Reflection to the paraxial rays:
    $$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$$