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
Metaphor therapy a psychological ground on which movement can occur, and this freedom of movement is the aim of therapy. By linking different things, metaphors aim at conceptual change through new insight, involving re-categorization of experience along new lines of meaning. Metaphorical interpretation of life, rather than analogical, combines the past with what is new. The transference relationship is thought of as an example of metaphor, a kind of symbolic translation of earlier strivings to present-day circumstances, as opposed to a re-enactment, which would lose the creative power of the metaphor and be merely analogic. The use of metaphor therapy in psychotherapeutic