# A report onWavelength               Spatial period of a periodic wave—the distance over which the wave's shape repeats.

- Wavelength ## 39 related topics with Alpha ## Lambda

11th letter of the Greek alphabet, representing the voiced alveolar lateral approximant.

11th letter of the Greek alphabet, representing the voiced alveolar lateral approximant.   Lambda indicates the wavelength of any wave, especially in physics, electronic engineering, and mathematics. ## Cnoidal wave

Nonlinear and exact periodic wave solution of the Korteweg–de Vries equation.

Nonlinear and exact periodic wave solution of the Korteweg–de Vries equation.      They are used to describe surface gravity waves of fairly long wavelength, as compared to the water depth. ## Nanometre

Unit of length in the metric system, equal to one billionth (short scale) of a metre (0 m).

Unit of length in the metric system, equal to one billionth (short scale) of a metre (0 m).  The nanometre is also commonly used to specify the wavelength of electromagnetic radiation near the visible part of the spectrum: visible light ranges from around 400 to 700 nm. ## Wave vector

Vector which helps describe a wave.

Vector which helps describe a wave. Its magnitude is either the wavenumber or angular wavenumber of the wave (inversely proportional to the wavelength), and its direction is ordinarily the direction of wave propagation (but not always; see below).

## Spatial frequency

Characteristic of any structure that is periodic across position in space.

Characteristic of any structure that is periodic across position in space.

Ordinary wavenumber is defined as the reciprocal of wavelength ## Optical fiber

Flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.

Flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.                     Optical fibers can be used as sensors to measure strain, temperature, pressure, and other quantities by modifying a fiber so that the property being measured modulates the intensity, phase, polarization, wavelength, or transit time of light in the fiber. ## Angular resolution

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.

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.  The Rayleigh criterion shows that the minimum angular spread that can be resolved by an image forming system is limited by diffraction to the ratio of the wavelength of the waves to the aperture width. ## Superlens

Lens which uses metamaterials to go beyond the diffraction limit.

Lens which uses metamaterials to go beyond the diffraction limit.      Furthermore, the level of feature detail, or image resolution, is limited to a length of a wave of radiation. ## Node (physics)

Point along a standing wave where the wave has minimum amplitude.

Point along a standing wave where the wave has minimum amplitude.  They occur at intervals of half a wavelength (λ/2). ## Planck constant    