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-than sign greater-than sign (>) is an original ASCII character (hex 3E, decimal 62). The character in Unicode is ; this is inherited from the same value in ASCII. Apart from this, Unicode also has the following variants: The greater-than sign is used for an approximation of the closing angle bracket (⟩). ASCII does not have angular brackets. BASIC and C-family languages, (including Java and C++) use the operator > to mean "greater than". In Lisp-family languages, > is a function used to mean "greater than". In Coldfusion and Fortran, operator .GT. means "greater than". The double greater-than sign (») is used