Table of Contents
112 relations: Airy disk, Aliasing, Amplitude, Angular frequency, Angular resolution, Aperture, Barred lambda, Bat, Bessel function, Boundary value problem, Brillouin zone, Cathode-ray tube, Cnoidal wave, Conservation of energy, Differential equation, Diffraction, Dispersion (optics), Dispersion relation, Dispersive prism, Double-slit experiment, Electric field, Electrical conductor, Electromagnetic radiation, Electromagnetic spectrum, Electron, Electronic band structure, Emission spectrum, Entrance pupil, Envelope (mathematics), Envelope (waves), Extraordinary optical transmission, Fourier analysis, Fraunhofer diffraction, Fraunhofer lines, Frequency, Fresnel diffraction, Greek alphabet, Hertz, Index of wave articles, Interferometry, Jacobi elliptic functions, Lambda, Length measurement, Light, Linearity, Louis de Broglie, Magnetic field, Mathematics, Matter wave, Metre, ... Expand index (62 more) »
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Airy disk
In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best-focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light.
Aliasing
In signal processing and related disciplines, aliasing is the overlapping of frequency components resulting from a sample rate below the Nyquist rate.
Amplitude
The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period).
Angular frequency
In physics, angular frequency (symbol ω), also called angular speed and angular rate, is a scalar measure of the angle rate (the angle per unit time) or the temporal rate of change of the phase argument of a sinusoidal waveform or sine function (for example, in oscillations and waves).
See Wavelength and Angular frequency
Angular resolution
Angular resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution.
See Wavelength and Angular resolution
Aperture
In optics, the aperture of an optical system (including a system consisted of a single lens) is a hole or an opening that primarily limits light propagated through the system.
Barred lambda
The barred lambda, ƛ, is a modified letter of the Greek alphabet.
See Wavelength and Barred lambda
Bat
Bats are flying mammals of the order Chiroptera.
Bessel function
Bessel functions, first defined by the mathematician Daniel Bernoulli and then generalized by Friedrich Bessel, are canonical solutions of Bessel's differential equation x^2 \frac + x \frac + \left(x^2 - \alpha^2 \right)y.
See Wavelength and Bessel function
Boundary value problem
In the study of differential equations, a boundary-value problem is a differential equation subjected to constraints called boundary conditions.
See Wavelength and Boundary value problem
Brillouin zone
In mathematics and solid state physics, the first Brillouin zone (named after Léon Brillouin) is a uniquely defined primitive cell in reciprocal space.
See Wavelength and Brillouin zone
Cathode-ray tube
A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen.
See Wavelength and Cathode-ray tube
Cnoidal wave
In fluid dynamics, a cnoidal wave is a nonlinear and exact periodic wave solution of the Korteweg–de Vries equation.
See Wavelength and Cnoidal wave
Conservation of energy
The law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be ''conserved'' over time.
See Wavelength and Conservation of energy
Differential equation
In mathematics, a differential equation is an equation that relates one or more unknown functions and their derivatives.
See Wavelength and Differential equation
Diffraction
Diffraction is the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture.
See Wavelength and Diffraction
Dispersion (optics)
In optics and in wave propagation in general, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency; sometimes the term chromatic dispersion is used for specificity to optics in particular.
See Wavelength and Dispersion (optics)
Dispersion relation
In the physical sciences and electrical engineering, dispersion relations describe the effect of dispersion on the properties of waves in a medium.
See Wavelength and Dispersion relation
Dispersive prism
In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow).
See Wavelength and Dispersive prism
Double-slit experiment
In modern physics, the double-slit experiment demonstrates that light and matter can satisfy the seemingly incongruous classical definitions for both waves and particles.
See Wavelength and Double-slit experiment
Electric field
An electric field (sometimes called E-field) is the physical field that surrounds electrically charged particles.
See Wavelength and Electric field
Electrical conductor
In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge (electric current) in one or more directions.
See Wavelength and Electrical conductor
Electromagnetic radiation
In physics, electromagnetic radiation (EMR) consists of waves of the electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy.
See Wavelength and Electromagnetic radiation
Electromagnetic spectrum
The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. Wavelength and electromagnetic spectrum are waves.
See Wavelength and Electromagnetic spectrum
Electron
The electron (or in nuclear reactions) is a subatomic particle with a negative one elementary electric charge.
Electronic band structure
In solid-state physics, the electronic band structure (or simply band structure) of a solid describes the range of energy levels that electrons may have within it, as well as the ranges of energy that they may not have (called band gaps or forbidden bands).
See Wavelength and Electronic band structure
Emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making a transition from a high energy state to a lower energy state.
See Wavelength and Emission spectrum
Entrance pupil
In an optical system, the entrance pupil is the optical image of the physical aperture stop, as 'seen' through the optical elements in front of the stop.
See Wavelength and Entrance pupil
Envelope (mathematics)
In geometry, an envelope of a planar family of curves is a curve that is tangent to each member of the family at some point, and these points of tangency together form the whole envelope.
See Wavelength and Envelope (mathematics)
Envelope (waves)
In physics and engineering, the envelope of an oscillating signal is a smooth curve outlining its extremes. Wavelength and envelope (waves) are waves.
See Wavelength and Envelope (waves)
Extraordinary optical transmission
Extraordinary optical transmission (EOT) is the phenomenon of greatly enhanced transmission of light through a subwavelength aperture in an otherwise opaque metallic film which has been patterned with a regularly repeating periodic structure.
See Wavelength and Extraordinary optical transmission
Fourier analysis
In mathematics, Fourier analysis is the study of the way general functions may be represented or approximated by sums of simpler trigonometric functions.
See Wavelength and Fourier analysis
Fraunhofer diffraction
In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when plane waves are incident on a diffracting object, and the diffraction pattern is viewed at a sufficiently long distance (a distance satisfying Fraunhofer condition) from the object (in the far-field region), and also when it is viewed at the focal plane of an imaging lens.
See Wavelength and Fraunhofer diffraction
Fraunhofer lines
The Fraunhofer lines are a set of spectral absorption lines.
See Wavelength and Fraunhofer lines
Frequency
Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time.
Fresnel diffraction
In optics, the Fresnel diffraction equation for near-field diffraction is an approximation of the Kirchhoff–Fresnel diffraction that can be applied to the propagation of waves in the near field.
See Wavelength and Fresnel diffraction
Greek alphabet
The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BC.
See Wavelength and Greek alphabet
Hertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second.
Index of wave articles
This is a list of wave topics. Wavelength and Index of wave articles are waves.
See Wavelength and Index of wave articles
Interferometry
Interferometry is a technique which uses the interference of superimposed waves to extract information.
See Wavelength and Interferometry
Jacobi elliptic functions
In mathematics, the Jacobi elliptic functions are a set of basic elliptic functions.
See Wavelength and Jacobi elliptic functions
Lambda
Lambda (.
Length measurement
Length measurement, distance measurement, or range measurement (ranging) refers to the many ways in which length, distance, or range can be measured.
See Wavelength and Length measurement
Light
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Wavelength and light are waves.
Linearity
In mathematics, the term linear is used in two distinct senses for two different properties.
Louis de Broglie
Louis Victor Pierre Raymond, 7th Duc de Broglie (also, or; 15 August 1892 – 19 March 1987) was a French aristocrat and physicist who made groundbreaking contributions to quantum theory.
See Wavelength and Louis de Broglie
Magnetic field
A magnetic field (sometimes called B-field) is a physical field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
See Wavelength and Magnetic field
Mathematics
Mathematics is a field of study that discovers and organizes abstract objects, methods, theories and theorems that are developed and proved for the needs of empirical sciences and mathematics itself.
See Wavelength and Mathematics
Matter wave
Matter waves are a central part of the theory of quantum mechanics, being half of wave–particle duality. Wavelength and Matter wave are waves.
See Wavelength and Matter wave
Metre
The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI).
Microscope
A microscope is a laboratory instrument used to examine objects that are too small to be seen by the naked eye.
Millimetre
Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales. The microwave is between 1 meter to 1 '''millimeter'''. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.
Modulation
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal called the modulation signal that typically contains information to be transmitted.
Molecular vibration
A molecular vibration is a periodic motion of the atoms of a molecule relative to each other, such that the center of mass of the molecule remains unchanged.
See Wavelength and Molecular vibration
Momentum
In Newtonian mechanics, momentum (momenta or momentums; more specifically linear momentum or translational momentum) is the product of the mass and velocity of an object.
Multiplicative inverse
In mathematics, a multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by x yields the multiplicative identity, 1.
See Wavelength and Multiplicative inverse
Nanometre
molecular scale. The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) of a meter (0.000000001 m) and to 1000 picometres.
Node (physics)
A node is a point along a standing wave where the wave has minimum amplitude. Wavelength and node (physics) are waves.
See Wavelength and Node (physics)
Numerical aperture
In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system can accept or emit light.
See Wavelength and Numerical aperture
Objective (optics)
In optical engineering, an objective is an optical element that gathers light from an object being observed and focuses the light rays from it to produce a real image of the object.
See Wavelength and Objective (optics)
Optical fiber
An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other.
See Wavelength and Optical fiber
Periodic function
A periodic function or cyclic function, also called a periodic waveform (or simply periodic wave), is a function that repeats its values at regular intervals or periods.
See Wavelength and Periodic function
Phase (waves)
In physics and mathematics, the phase (symbol φ or ϕ) of a wave or other periodic function F of some real variable t (such as time) is an angle-like quantity representing the fraction of the cycle covered up to t. It is expressed in such a scale that it varies by one full turn as the variable t goes through each period (and F(t) goes through each complete cycle).
See Wavelength and Phase (waves)
Phase velocity
The phase velocity of a wave is the rate at which the wave propagates in any medium.
See Wavelength and Phase velocity
Phonon
A phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, specifically in solids and some liquids.
Photonics
Photonics is a branch of optics that involves the application of generation, detection, and manipulation of light in form of photons through emission, transmission, modulation, signal processing, switching, amplification, and sensing.
Physics
Physics is the natural science of matter, involving the study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force.
Planck constant
The Planck constant, or Planck's constant, denoted by is a fundamental physical constant of foundational importance in quantum mechanics: a photon's energy is equal to its frequency multiplied by the Planck constant, and the wavelength of a matter wave equals the Planck constant divided by the associated particle momentum.
See Wavelength and Planck constant
Plane wave
In physics, a plane wave is a special case of a wave or field: a physical quantity whose value, at any moment, is constant through any plane that is perpendicular to a fixed direction in space.
Quantum mechanics
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms.
See Wavelength and Quantum mechanics
Radio telescope
A radio telescope is a specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky.
See Wavelength and Radio telescope
Rayleigh scattering
Rayleigh scattering, named after the 19th-century British physicist Lord Rayleigh (John William Strutt), is the predominantly elastic scattering of light, or other electromagnetic radiation, by particles with a size much smaller than the wavelength of the radiation.
See Wavelength and Rayleigh scattering
Red
Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet.
Refraction
In physics, refraction is the redirection of a wave as it passes from one medium to another.
Refractive index
In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium.
See Wavelength and Refractive index
Sampling (signal processing)
In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal.
See Wavelength and Sampling (signal processing)
Sinc function
In mathematics, physics and engineering, the sinc function, denoted by, has two forms, normalized and unnormalized.
See Wavelength and Sinc function
Sine and cosine
In mathematics, sine and cosine are trigonometric functions of an angle.
See Wavelength and Sine and cosine
Sine wave
A sine wave, sinusoidal wave, or sinusoid (symbol: ∿) is a periodic wave whose waveform (shape) is the trigonometric sine function. Wavelength and sine wave are waves.
Small-angle approximation
The small-angle approximations can be used to approximate the values of the main trigonometric functions, provided that the angle in question is small and is measured in radians: \begin \sin \theta &\approx \theta \\ \cos \theta &\approx 1 - \frac \approx 1\\ \tan \theta &\approx \theta \end These approximations have a wide range of uses in branches of physics and engineering, including mechanics, electromagnetism, optics, cartography, astronomy, and computer science.
See Wavelength and Small-angle approximation
Snell's law
Snell's law (also known as the Snell–Descartes law, the ibn-Sahl law, and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.
See Wavelength and Snell's law
Sound
In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. Wavelength and sound are waves.
Sound pressure
Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average or equilibrium) atmospheric pressure, caused by a sound wave.
See Wavelength and Sound pressure
Spatial frequency
In mathematics, physics, and engineering, spatial frequency is a characteristic of any structure that is periodic across position in space.
See Wavelength and Spatial frequency
Spectral line
A spectral line is a weaker or stronger region in an otherwise uniform and continuous spectrum.
See Wavelength and Spectral line
Spectroscopy
Spectroscopy is the field of study that measures and interprets electromagnetic spectra.
See Wavelength and Spectroscopy
Spectrum
A spectrum (spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum.
Spectrum (physical sciences)
In the physical sciences, the term spectrum was introduced first into optics by Isaac Newton in the 17th century, referring to the range of colors observed when white light was dispersed through a prism.
See Wavelength and Spectrum (physical sciences)
Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant that is exactly equal to). According to the special theory of relativity, is the upper limit for the speed at which conventional matter or energy (and thus any signal carrying information) can travel through space.
See Wavelength and Speed of light
Speed of sound
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium.
See Wavelength and Speed of sound
Standard temperature and pressure
Standard temperature and pressure (STP) or Standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data.
See Wavelength and Standard temperature and pressure
Standing wave
In physics, a standing wave, also known as a stationary wave, is a wave that oscillates in time but whose peak amplitude profile does not move in space.
See Wavelength and Standing wave
Subwavelength-diameter optical fibre
A subwavelength-diameter optical fibre (SDF or SDOF) is an optical fibre whose diameter is less than the wavelength of the light being propagated through it.
See Wavelength and Subwavelength-diameter optical fibre
Superlens
A superlens, or super lens, is a lens which uses metamaterials to go beyond the diffraction limit.
Superposition principle
The superposition principle, also known as superposition property, states that, for all linear systems, the net response caused by two or more stimuli is the sum of the responses that would have been caused by each stimulus individually. Wavelength and superposition principle are waves.
See Wavelength and Superposition principle
Telescope
A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.
Thomas Young (scientist)
Thomas Young FRS (13 June 177310 May 1829) was a British polymath who made notable contributions to the fields of vision, light, solid mechanics, energy, physiology, language, musical harmony, and Egyptology.
See Wavelength and Thomas Young (scientist)
Uncertainty principle
The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics.
See Wavelength and Uncertainty principle
Vacuum
A vacuum (vacuums or vacua) is space devoid of matter.
Violet (color)
Violet is the color of light at the short wavelength end of the visible spectrum.
See Wavelength and Violet (color)
Visible spectrum
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye.
See Wavelength and Visible spectrum
Wave
In physics, mathematics, engineering, and related fields, a wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities. Wavelength and wave are waves.
Wave function
In quantum physics, a wave function (or wavefunction) is a mathematical description of the quantum state of an isolated quantum system. Wavelength and wave function are waves.
See Wavelength and Wave function
Wave interference
In physics, interference is a phenomenon in which two coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference.
See Wavelength and Wave interference
Wave packet
In physics, a wave packet (also known as a wave train or wave group) is a short burst of localized wave action that travels as a unit, outlined by an envelope.
See Wavelength and Wave packet
Wave vector
In physics, a wave vector (or wavevector) is a vector used in describing a wave, with a typical unit being cycle per metre.
See Wavelength and Wave vector
Wavenumber
In the physical sciences, the wavenumber (or wave number), also known as repetency, is the spatial frequency of a wave, measured in cycles per unit distance (ordinary wavenumber) or radians per unit distance (angular wavenumber).
Wind wave
In fluid dynamics, a wind wave, or wind-generated water wave, is a surface wave that occurs on the free surface of bodies of water as a result of the wind blowing over the water's surface.
WKB approximation
In mathematical physics, the WKB approximation or WKB method is a method for finding approximate solutions to linear differential equations with spatially varying coefficients.
See Wavelength and WKB approximation
Zero crossing
A zero-crossing is a point where the sign of a mathematical function changes (e.g. from positive to negative), represented by an intercept of the axis (zero value) in the graph of the function.
See Wavelength and Zero crossing
Zero-mode waveguide
A zero-mode waveguide is an optical waveguide that guides light energy into a volume that is small in all dimensions compared to the wavelength of the light.
See Wavelength and Zero-mode waveguide
3-manifold
In mathematics, a 3-manifold is a topological space that locally looks like a three-dimensional Euclidean space.
See also
Length
- Arc length
- Atomic radius
- Barbier's theorem
- Biblical mile
- Bond length
- Characteristic length
- Charge radius
- Classical electron radius
- Cloud drop effective radius
- Debye length
- Diameter
- Displacement (geometry)
- Dot pitch
- Effective range
- Equivalent spherical diameter
- Euclidean distance
- Feret diameter
- Focal length
- Galaxy effective radius
- Height
- Hydraulic diameter
- Hyperfocal distance
- Kilometre per square kilometre
- Length
- Length contraction
- Linear density
- List of examples of lengths
- Mean line segment length
- Mean radius
- Moment (physics)
- Orders of magnitude (length)
- Perimeter
- Radius
- Sauter mean diameter
- Spatial scale
- Staircase paradox
- Stokes radius
- String girdling Earth
- True length
- Units of length
- Vertical extent
- Wavelength
- Wetted perimeter
- Wingspan
- Work (physics)
References
Also known as Angular wavelength, Long Wavelength Limit, Optical wavelength, Spatial period, Subwavelength, Vacuum wavelength, Wave lenght, Wave length, Wavelenght, Wavelength of light, Wavelengths.