harmonic spectrum — harmoninis spektras statusas T sritis fizika atitikmenys: angl. Fourier spectrum; harmonic spectrum vok. Fourier Spektrum, n; harmonisches Spektrum, n; Oberwellenspektrum, n rus. гармонический спектр, m pranc. spectre harmonique, m … Fizikos terminų žodynas
Spectrum (functional analysis) — In functional analysis, the concept of the spectrum of a bounded operator is a generalisation of the concept of eigenvalues for matrices. Specifically, a complex number λ is said to be in the spectrum of a bounded linear operator T if… … Wikipedia
Spectrum analyzer — A spectrum analyzer Spectrum analyzer display A spectrum analyzer measures the magnitude of an input signal versus frequency with … Wikipedia
harmonic analysis — Math. 1. the calculation of Fourier series and their generalization. 2. the study of Fourier series and their generalization. Also called Fourier analysis. [1865 70] * * * ▪ mathematics mathematical procedure for describing and analyzing… … Universalium
Fourier spectrum — harmoninis spektras statusas T sritis fizika atitikmenys: angl. Fourier spectrum; harmonic spectrum vok. Fourier Spektrum, n; harmonisches Spektrum, n; Oberwellenspektrum, n rus. гармонический спектр, m pranc. spectre harmonique, m … Fizikos terminų žodynas
Quantum harmonic oscillator — The quantum harmonic oscillator is the quantum mechanical analogue of the classical harmonic oscillator. It is one of the most important model systems in quantum mechanics because an arbitrary potential can be approximated as a harmonic potential … Wikipedia
Second harmonic generation — (SHG; also called frequency doubling) is a nonlinear optical process, in which photons interacting with a nonlinear material are effectively combined to form new photons with twice the energy, and therefore twice the frequency and half the… … Wikipedia
Discrete spectrum — For a mathematically rigorous point of view of discrete spectrum , see decomposition of spectrum (functional analysis). In physics, an elementary (and accurate) explanation of a discrete spectrum is that it is an emission spectrum or absorption… … Wikipedia
Continuous spectrum — The spectrum of a linear operator is commonly divided into three parts: point spectrum, continuous spectrum, and residual spectrum. If H is a topological vector space and is a linear map, the spectrum of A is the set of complex numbers λ such… … Wikipedia
Frequency spectrum — Familiar concepts associated with a frequency are colors, musical notes, radio/TV channels, and even the regular rotation of the earth. A source of light can have many colors mixed together and in different amounts (intensities). A rainbow, or… … Wikipedia