Reflection is the reversal in direction of a particle stream or wave upon encountering a boundary. The law of reflection states that the angle of reflection and angle of incidence are equal,
with each angle being measured from the normal to the boundary. It is possible for only partial reflection to occur at a boundary, with part of the wave or particle stream being transmitted through the boundary. A quantity that characterizes the amount of reflection relative to transmission is called the impedance. For electromagnetic radiation, the ratio of reflected to total incident light is called the albedo of a surface.
Albedo, Fresnel Equations, Frustrated Total Internal Reflection, Impedance, Law of Reflection, Malus and Dupin Theorem, Quantum Reflection, Refraction, Reflectance, Reflecting Prism, Reflectance, Reflectivity, Standing Wave, Total Internal Reflection, Transmittance
