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electromagnetic radiation Dictionary Terms

fluorescent screen
A fluorescent screen refers to a phosphorescent or fluorescent-coated surface that emits visible light when exposed to other...
remote sensing
Remote sensing is a method of data collection and observation where information about objects, areas, or phenomena on...
diffractometer
A measurement device used to study the structure of matter using the diffraction of electromagnetic radiation.
integration time
Integration time, in the context of optics, imaging systems, and sensor technology, refers to the duration over which a...
gamma ray
The spontaneous emittance of electromagnetic radiation by the nucleus of certain radioactive elements during their quantum...
atomic absorption spectrometer
An atomic absorption spectrometer (AAS) is an analytical instrument used to determine the concentration of specific chemical...
dispersion formula
All formulas that present the index of refraction as a function of a wavelength of electromagnetic radiation. Also called...
luminous
Pertaining to electromagnetic radiation as perceived by the eye; that is, with the contributions as wavelengths in the...
vibrational transition
A vibrational transition refers to a change in the vibrational energy of a molecule. Molecules consist of atoms that are...
organic dye
Any organic substance, that when dissolved in appropriate liquid based solvents will absorb and emit electromagnetic...
Lorentz oscillator model
The Lorentz oscillator model is a theoretical model used in physics to describe the response of a charged particle (such as...
accessible emission
The present radiation level within a laser or electromagnetic radiation operating area.
Planck's law
A fundamental law of quantum theory which states that the discrete quanta of energy transfers associated with...
radiant energy
The energy passed on as electromagnetic radiation; e.g., radio, heat or light waves.
spectral signature
A spectral signature, in the context of remote sensing and spectroscopy, refers to the unique pattern or characteristic...
spectroradiometer
A spectroradiometer is a device used to measure the intensity of light at different wavelengths across the electromagnetic...
bremsstrahlung
Electromagnetic radiation that is emitted by an electron as it is accelerated or decelerated while moving through the...
blackbody source
A blackbody source, often simply referred to as a blackbody, is a theoretical or practical physical object that absorbs all...
radiant
Pertaining to electromagnetic radiation, with the contributions at all wavelengths of interest weighted equally.
extreme ultraviolet
Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum....
radio telescope
An instrument designed to collect naturally formed extraterrestrial electromagnetic radiation within the radio frequency...
image converter
An electron tube that employs electromagnetic radiation to produce a visual replica of an image produced on its cathode....
free-electron laser
A free-electron laser (FEL) is a type of laser that generates coherent, high-intensity electromagnetic radiation by using a...
fluorescence
Fluorescence is a type of luminescence, which is the emission of light by a substance that has absorbed light or other...
negative-refraction metamaterial
An artificial material, engineered to have a negative refractive index value, such that light or any other form of...
synchrotron
A synchrotron is a type of particle accelerator that uses magnetic fields to steer charged particles, typically electrons or...
hyperspectral resolution
Hyperspectral resolution refers to the level of detail or granularity in the spectral information captured by a...
infrared camera
An infrared camera, also known as a thermal imaging camera or IR camera, is a device that captures and visualizes the...
electromagnetic radiation
Radiation emitted from vibrating charged particles. A combination of oscillating electrical and magnetic fields that...
magneto-optics
Magneto-optics refers to the study and manipulation of the interaction between magnetic fields and light (electromagnetic...
photonic cavity
A photonic cavity, also known as an optical cavity, is a structure that confines electromagnetic radiation within a certain...
directed energy
Directed energy refers to a type of energy that is emitted and transferred in a controlled direction. The term is often...
ultraviolet reflectance
Ultraviolet reflectance refers to the ability of a material or surface to reflect UV light. Ultraviolet light is...
angstrom
An angstrom, symbolized by the Ångström or Å, is a unit of length used to express atomic and molecular...
frequency
With reference to electromagnetic radiation, the number of crests of waves that pass a fixed point in a given unit of time,...
plasmonics
Plasmonics is a field of science and technology that focuses on the interaction between electromagnetic radiation and free...
radio astronomy
The detection and analysis of naturally formed extraterrestrial electromagnetic radiation within the radio frequency range...
ultraviolet fiber optics
Ultraviolet (UV) fiber optics refers to optical fibers that are designed and optimized for the transmission of ultraviolet...
detector array
A detector array refers to a collection of individual detector elements arranged in a two-dimensional grid or matrix format....
light
Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications...
spectroscopy
Spectroscopy is a technique used in the study of interactions between matter and electromagnetic radiation. It involves...
terahertz radiation
Electromagnetic radiation with frequencies between 300 GHz and 10 THz, and existing between regions of the electromagnetic...
Mie scattering
Mie scattering, named after the German physicist Gustav Mie, refers to the scattering of electromagnetic radiation (such as...
medium
Any substance or space through which electromagnetic radiation can travel.
accessible radiation
Electromagnetic radiation present upon the open aperture of the source within an operating environment.
nonradiative transition
A nonradiative transition refers to a process in which an electron or an atom undergoes a change in its energy state without...
absorption peak
An absorption peak refers to a sharp increase or spike in the absorption of electromagnetic radiation at a particular...
optical clock
An optical clock is a highly precise and advanced timekeeping device that relies on the oscillations of electromagnetic...

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