Atomic, molecular, and optical physics the origin of the index of refraction treated an electron in an atomic system classically according to the model of Paul Drude and Hendrik Lorentz. The theory was developed to attempt to provide an origin for the wavelength-dependent refractive index "n" of a material. In this model, incident electromagnetic waves forced an electron bound to an atom to oscillate. The amplitude of the oscillation would then have a relationship to the frequency of the incident electromagnetic wave and the resonant frequencies of the oscillator. The superposition of these emitted waves from many oscillators would then lead to a wave which
Greater Netherlands either within the Netherlands or as independent state with strong links with the Netherlands. Many Orangists are Greater Dutch and vice versa, but not all Greater Dutch are monarchist Orangists, as some want to structure the state differently. Orangism has become more popular since 1980, when the term was used to refer to the Greater Netherlands projects, with a focus on the restoration of the Dutch royal family to the entire Dutch-populated part of the region. The popularity of the House of Orange-Nassau in Flanders is partly based on the francophile tendency of the Belgian monarchy. Contemporary Orangism in Flanders