Electromagnetic radiation is a propagating wave in space with electric and magnetic components. These components oscillate at right angles to each other and to the direction of propagation. The term electromagnetic radiation is also used as a synonym for electromagnetic waves in general, even if they are not radiating or travelling in free space. This sense includes, for example, light travelling through an optica ...

Including:

• Electromagnetic radiation - Physics
• Electromagnetic radiation - Theory
• Electromagnetic radiation - Properties
• Electromagnetic radiation - Wave model
• Electromagnetic radiation - Particle model
• Electromagnetic radiation - Speed of propagation
• Electromagnetic radiation - Electromagnetic spectrum
• Electromagnetic radiation - Light
• Electromagnetic radiation - Radio waves
• Electromagnetic radiation - Derivation

Read more here: » Electromagnetic radiation: Encyclopedia - Electromagnetic radiation

See also:

Electromagnetic radiation, Electromagnetic radiation - Physics, Electromagnetic radiation - Theory, Electromagnetic radiation - Properties, Electromagnetic radiation - Wave model, Electromagnetic radiation - Particle model, Electromagnetic radiation - Speed of propagation, Electromagnetic radiation - Electromagnetic spectrum, Electromagnetic radiation - Light, Electromagnetic radiation - Radio waves, Electromagnetic radiation - Derivation

Read more here: » Electromagnetic radiation: Encyclopedia II - Electromagnetic radiation - Physics

Generally, EM radiation is classified by wavelength into electrical energy, radio, microwave, infrared, the visible region we perceive as light, ultraviolet, X-rays and gamma rays. The behavior of EM radiation depends on its wavelength. Higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths. When EM radiation interacts with single atoms and molecules, its behavior depends on the amount of energy per quantum it carries. Spectroscopy can detect a much wider region of the EM spectrum than the vi ...

See also:

Electromagnetic radiation, Electromagnetic radiation - Physics, Electromagnetic radiation - Theory, Electromagnetic radiation - Properties, Electromagnetic radiation - Wave model, Electromagnetic radiation - Particle model, Electromagnetic radiation - Speed of propagation, Electromagnetic radiation - Electromagnetic spectrum, Electromagnetic radiation - Light, Electromagnetic radiation - Radio waves, Electromagnetic radiation - Derivation

Read more here: » Electromagnetic radiation: Encyclopedia II - Electromagnetic radiation - Electromagnetic spectrum

Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength. The three basic dimensions of light (i.e., all electromagnetic radiation) are: Intensity (or brilliance or amplitude), which is related to the human perception of brightness of the light, Frequency (or wavelength), perceived by humans as the color of the light, and Polarization (or angle of vibration), which is not perceptible by ...

Including:

• Light - Visible electromagnetic radiation
• Light - Speed of light
• Light - Refraction
• Light - Optics
• Light - Color and wavelengths
• Light - Measurement of light
• Light - Light sources
• Light - Theories about light
• Light - Early Greek ideas
• Light - 10th century optical theory
• Light - The 'plenum'
• Light - Particle theory
• Light - Wave theory
• Light - Electromagnetic theory
• Light - Particle theory revisited
• Light - Quantum theory
• Light - Wave-particle duality
• Light - A light wave

Read more here: » Light: Encyclopedia - Light

Radiation can refer to one of the following: Specific types in physics: Alpha radiation, composed of the nuclei of helium-4 atoms. Beta radiation, consisting of energetic electrons or positrons. Gamma radiation, which are high-energy electromagnetic waves such as X rays. Delta radiation Epsilon radiation Cherenkov radiation, radiation by a particle moving through an insulating medium faster than the speed of light in that medium. Electromagnetic radiation, a str ...

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In electromagnetics and communications engineering, a waveguide is a physical structure that guides the propagation of electromagnetic waves. Waveguides can be constructed to carry waves over a wide portion of the electromagnetic spectrum, but are especially useful in the microwave and optical frequency ranges. Depending on the frequency, they can be constructed from either conductive or dielectric materials. Waveguides are used for transferring both power and communication signals. Waveguide - History. The ...

Including:

• Waveguide - History
• Waveguide - Principles of operation
• Waveguide - Hollow metallic waveguides
• Waveguide - Transmission lines
• Waveguide - Dielectric waveguides

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Frequency is the measurement of the number of times that a repeated event occurs per unit time. It is also defined as the rate of change of phase of a sinusoidal waveform. Frequency - Measurement. To calculate the frequency of an event, the number of occurrences of the event within a fixed time interval are counted, and then divided by the length of the time interval. In SI units, the result is measured in hertz (Hz), named after the German physicist Heinrich Rudolf Hertz. 1 Hz m ...

Including:

• Frequency - Measurement
• Frequency - Frequency of waves
• Frequency - Invariance
• Frequency - Reference frequencies
• Frequency - Examples

Read more here: » Frequency: Encyclopedia - Frequency

Cyclotron radiation is a type of bremsstrahlung (braking) radiation. It is electromagnetic radiation emitted by moving charged particles trapped in a magnetic field. The Lorentz force on the particles acts perpendicular to both the magnetic field lines and the particle's motion through them, creating an acceleration of charged particles that causes them to emit radiation (and to spiral around the magnetic field lines). The name of this radiation derives from the cyclotron, a type of particle accelerator used since the 1930s to ...

Read more here: » Cyclotron radiation: Encyclopedia - Cyclotron radiation

Bremsstrahlung, (from the German bremsen, to brake and Strahlung, radiation), is electromagnetic radiation produced by the acceleration of a charged particle, such as an electron, when deflected by another charged particle, such as an atomic nucleus. The term is also used to refer to the process of producing the radiation. Bremsstrahlung has a continuous spectrum. The phenomenon was discovered by Nikola Tesla during high frequ ...

Including:

• Bremsstrahlung - Outer
• Bremsstrahlung - Inner
• Bremsstrahlung - Secondary radiation
• Bremsstrahlung - From a plasma

Read more here: » Bremsstrahlung: Encyclopedia - Bremsstrahlung

Cherenkov radiation (also spelled Cerenkov or sometimes Čerenkov) is electromagnetic radiation emitted when a charged particle passes through an insulator at a speed greater than that of light in the medium. The characteristic "blue glow" of nuclear reactors is due to Cherenkov radiation. It is named after Pavel Alekseyevich Cherenkov, the 1958 Nobel Prize winner who was the first to rigorously characterize it. Cherenkov radiation - Physical origin. While relativity holds that the speed of li ...

Including:

• Cherenkov radiation - Physical origin
• Cherenkov radiation - Characteristics
• Cherenkov radiation - Uses
• Cherenkov radiation - Notes

Read more here: » Cherenkov radiation: Encyclopedia - Cherenkov radiation

Incandescence is the release of electromagnetic radiation from a hot body due to its high temperature. The release of radiation is usually in the infrared (heat) region, known as thermal radiation, and the visible light region of the electromagnetic spectrum. Incandescence occurs in light bulbs, because the filament resists electron flow. This excites electrons in the filament material to jump to a higher atomic orbital and thus subsequently release a photon when they fall back to their original orbits. Depending on the energy differe ...

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edit In cosmology, the cosmic microwave background radiation (most often abbreviated CMB but occasionally CMBR, CBR or MBR) is a form of electromagnetic radiation discovered in 1965. It has a thermal black-body spectrum which peaks in the microwave range. Most cosmologists consider the cosmic microwave background radiation to be the best evidence for the hot big bang model of the universe. Cosmic microwave background radiation - Features. The cosmic microwav ...

Including:

• Cosmic microwave background radiation - Features
• Cosmic microwave background radiation - History
• Cosmic microwave background radiation - Relationship to the Big Bang
• Cosmic microwave background radiation - Temperature
• Cosmic microwave background radiation - Primary anisotropy
• Cosmic microwave background radiation - Polarization
• Cosmic microwave background radiation - Secondary anisotropy
• Cosmic microwave background radiation - Microwave background observations
• Cosmic microwave background radiation - Analyses
• Cosmic microwave background radiation - Low multipoles

Read more here: » Cosmic microwave background radiation: Encyclopedia - Cosmic microwave background radiation

In physics, a black body is an object that absorbs all electromagnetic radiation that falls onto it. No radiation passes through it and none is reflected. Despite the name, black bodies are not actually black as they radiate energy as well. How much electromagnetic radiation they give off just depends on their temperature. Black bodies below around 700K produce very little radiation at visible wavelengths and appear black. Black bodies above this temperature however, start to produce radiation at visible wavelengths starting at red, going through orange, yellow and white befor ...

Including:

• Black body - Details
• Black body - Equations governing black bodies
• Black body - Planck's law of black-body radiation
• Black body - Wien's displacement law
• Black body - Stefan-Boltzmann law
• Black body - Temperature relation between a planet and its star
• Black body - Assumptions
• Black body - Derivation
• Black body - The result
• Black body - Temperature of the Sun
• Black body - Temperature of the Sun using Mars data
• Black body - Footnotes

Read more here: » Black body: Encyclopedia - Black body

A bolometer is a device for measuring incident electromagnetic radiation. It was invented in 1878 by the american astronomer Samuel Pierpont Langley It consists of an "absorber", which is connected to a heat sink (area of constant temperature) through an insulating link. The result is that any radiation absorbed by the absorber raises its temperature above that of the heat sink—the higher the pow ...

Including:

• Bolometer - Langley's bolometer

Read more here: » Bolometer: Encyclopedia - Bolometer

electromagnetic radiation

Radiation of different wavelengths extending from radio waves to gamma rays and including visible light; often divided between natural (including ki or universal life energy) and artificial such as electrical or microwave

(See also: Electromagnetic radiation, Body Mind and Soul)

Definition and meaning of electromagnetic radiation:

electromagnetic radiation - energy that travels through space in the form of waves. The highest frequencies in the spectrum of electromagnetic radiation are gamma-rays; the lowest frequencies are radio waves. All electromagnetic radiation travels at the speed of light. Shorter wavelength radiation (eg, ultraviolet) carries more energy and is likely to be more harmful to living tissue

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

Also see these pages: Oceanography, Oceanography Sitemap, Coral Reef, Environment, Sustainability, Climate Change,

The energy of a photon (i.e., a quantum of electromagnetic radiation) is given by the Planck equation: E = hν where E is the energy of the photon h is Planck's constant ν is the frequency of the photon The wavelength of a photon is related to its frequency by the equation of a wave's v ...

See also:

Ionizing radiation, Ionizing radiation - Types of radiation, Ionizing radiation - Example: Electromagnetic radiation, Ionizing radiation - Sources of ionizing radiation, Ionizing radiation - Natural background radiation, Ionizing radiation - Man-made radiation sources, Ionizing radiation - The effects of ionizing radiation on animals, Ionizing radiation - Chronic radiation exposure, Ionizing radiation - Acute radiation exposure, Ionizing radiation - Radiation levels, Ionizing radiation - Minimizing health effects of ionizing radiation

Read more here: » Ionizing radiation: Encyclopedia II - Ionizing radiation - Example: Electromagnetic radiation

This can be in any range of wavelengths: Radio waves Microwaves Infrared light (see infrared spectroscopy) Visible light (see UV/visible spectroscopy) Ultraviolet light (see UV/visible spectroscopy) X-rays Electromagnetic spectroscopy can be classified into narrower fields as discussed below, though in some spectroscopic techniques, several processes may be happening at the same time. ...

See also:

Electromagnetic spectroscopy, Electromagnetic spectroscopy - Types of electromagnetic radiation measured, Electromagnetic spectroscopy - Types of electromagnetic spectroscopy, Electromagnetic spectroscopy - Emission spectroscopy, Electromagnetic spectroscopy - Absorption spectroscopy, Electromagnetic spectroscopy - Other techniques, Electromagnetic spectroscopy - Examples, Electromagnetic spectroscopy - The spectrum of sunlight, Electromagnetic spectroscopy - Absorption in the atmosphere

Read more here: » Electromagnetic spectroscopy: Encyclopedia II - Electromagnetic spectroscopy - Types of electromagnetic radiation measured

Photochemistry - Regions of the electromagnetic spectrum. The electromagnetic spectrum is broad, however, a photochemist will find themselves working with several key regions. Some of the most widely used sections of the electromagnetic spectrum include: Visible Light: ~400-700nm wavelengths Ultraviolet  : ~100-400nm wavelengths Near Infrared: ~700-1000nm wavelengths Far Infrar ...

See also:

Photochemistry, Photochemistry - Electromagnetic Radiation, Photochemistry - Regions of the electromagnetic spectrum, Photochemistry - Electric and magnetic fields and interactions with charged particles, Photochemistry - Wave and particle nature of light and matter, Photochemistry - Photoelectric effect, Photochemistry - Compton effect, Photochemistry - Quantum nature of waves and matter, Photochemistry - Properties of distribution functions, Photochemistry - Black-body radiation, Photochemistry - DeBroglie wavelength, Photochemistry - Schrodinger's equation, Photochemistry - Optics, Photochemistry - Scattering and polarizability, Photochemistry - Absorption and emission of light, Photochemistry - Energy levels of atoms and molecules expressed in terms of waves, Photochemistry - Atomic spectroscopy, Photochemistry - Diatomic molecular spectroscopy, Photochemistry - Photochemical kinetics and reactivity Jablonski diagrams, Photochemistry - Light amplification by stimulated emission of radiation laser, Photochemistry - Experimental methods in spectroscopy and photochemistry

Read more here: » Photochemistry: Encyclopedia II - Photochemistry - Electromagnetic Radiation

Ionizing radiation - Natural background radiation. Natural background radiation comes from four primary sources: cosmic radiation, solar radiation, external terrestrial sources, and radon. The earth, and all living things on it, are constantly bombarded by radiation from outside our solar system of positively charged ions from protons to iron nuclei. This radiation interacts in the atmosphere to create secondary radiation that rains down, including x-rays, muons, protons, alpha particles, pions, electrons, and neutrons. The dose f ...

See also:

Ionizing radiation, Ionizing radiation - Types of radiation, Ionizing radiation - Example: Electromagnetic radiation, Ionizing radiation - Sources of ionizing radiation, Ionizing radiation - Natural background radiation, Ionizing radiation - Man-made radiation sources, Ionizing radiation - The effects of ionizing radiation on animals, Ionizing radiation - Chronic radiation exposure, Ionizing radiation - Acute radiation exposure, Ionizing radiation - Radiation levels, Ionizing radiation - Minimizing health effects of ionizing radiation

Read more here: » Ionizing radiation: Encyclopedia II - Ionizing radiation - Sources of ionizing radiation