Information about Incandescent
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Molten glassy material glows orange with incandescence in a vitrification experiment.
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The incandescent metal embers of the spark used to light this Bunsen burner emit light ranging in color from white to orange to red or to blue. This change correlates with their temperature as they cool in the air. Note that the flame itself is not incandescent as its blue color is due to various other atomic and molecular energy transitions.
Incandescence is the release of thermal radiation from a body due to its temperature. The distribution of energy emissions across the electromagnetic spectrum is described by Planck's law; at temperatures occurring on Earth, the release of radiation is usually predominantly in the infrared and visible regions of the electromagnetic spectrum. The total power emitted by radiation is given by the Stefan-Boltzmann law.
Incandescence occurs in light bulbs, because the filament resists the flow of electrons. This resistance heats the filament to a temperature where part of the black body radiation falls in the visible spectrum. The majority of radiation, however, is emitted in the invisible infrared and lower frequency spectrums, which is why incandescent light bulbs are very inefficient. The mechanism of the incandescence is as follows: the temperature of the filament causes electrons in it to be excited to an atomic orbital of higher energy; when an electron falls back to the more stable ground state orbital, it releases the energy thus stored, in the form of a photon. The frequency of the emitted photon is determined by the energy difference between the two orbitals. The same process occurs in plasma, of which fire is a well-known example.
Fluorescent lamps do not function by means of incandescence, rather by a combination of thermionic emission and atomic exitation.
See also
Thermal radiation is electromagnetic radiation emitted from the surface of an object which is due to the object's temperature. Infrared radiation from a common household radiator or electric heater is an example of thermal radiation, as is the light emitted by a glowing
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electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation. The "electromagnetic spectrum" (usually just spectrum) of an object is the frequency range of electromagnetic radiation with wavelengths from thousands of kilometers down to fractions of
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For a general introduction, see black body.
In physics, Planck's law describes the spectral radiance of electromagnetic radiation at all wavelengths from a black body at temperature .
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In physics, Planck's law describes the spectral radiance of electromagnetic radiation at all wavelengths from a black body at temperature .
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Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. The name means "below red" (from the Latin infra, "below"), red being the color of visible light with the longest wavelength.
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visible spectrum (or sometimes optical spectrum) is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light.
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incandescent light bulb (also spelled lightbulb) or incandescent lamp is a source of artificial light that works by incandescence. An electrical current passes through a thin filament, heating it until it produces light.
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Electrical resistance is a measure of the degree to which an object opposes an electric current through it. The SI unit of electrical resistance is the ohm. Its reciprocal quantity is electrical conductance measured in siemens.
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Electric current is the flow (movement) of electric charge. The SI unit of electric current is the ampere (A), which is equal to a flow of one coulomb of charge per second.
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Definition
The amount of electric current (measured in amperes) through some surface, e.g...... Click the link for more information.
An atomic orbital is a mathematical description of the region in which an electron may be found around a single atom.[1] Specifically, atomic orbitals are the possible quantum states of the individual electrons in the electron cloud around a single atom.
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Photon
Photons emitted in a coherent beam from a laser
Composition: Elementary particle
Family: Boson
Group: Gauge boson
Interaction: Electromagnetic
Theorized: Albert Einstein (1905–17)
Symbol: or
Mass: 0[1]
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Photons emitted in a coherent beam from a laser
Composition: Elementary particle
Family: Boson
Group: Gauge boson
Interaction: Electromagnetic
Theorized: Albert Einstein (1905–17)
Symbol: or
Mass: 0[1]
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FreQuency is a music video game developed by Harmonix and published by SCEI. It was released in November 2001. A sequel, titled Amplitude was released in 2003.
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Plasma may refer to:
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- Blood plasma, the yellow-colored liquid component of blood, in which blood cells are suspended
- Plasma (physics), an ionized gas where the electrons in the atom are separate from the nucleus, usually considered to be the fourth distinct state of
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Fire is an oxidation process that releases energy in varying intensities in the form of light (with wavelengths also outside the visual spectrum) and heat and often creates smoke. It is commonly used to describe either a fuel in a state of combustion (e.g.
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fluorescent lamp is a gas-discharge lamp that uses electricity to excite mercury vapor in argon or neon gas, resulting in a plasma that produces short-wave ultraviolet light. This light then causes a phosphor to fluoresce, producing visible light.
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Thermionic emission (archaically known as the Edison effect) is the flow of charged particles called thermions from a charged metal or a charged metal oxide surface, caused by thermal vibrational energy overcoming the electrostatic forces holding electrons to the
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Excitation is an elevation in energy level above an arbitrary baseline energy state. In physics there is a specific technical definition for energy level which is often associated with an atom being excited to an excited state.
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incandescent light bulb (also spelled lightbulb) or incandescent lamp is a source of artificial light that works by incandescence. An electrical current passes through a thin filament, heating it until it produces light.
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black body is an object that absorbs all electromagnetic radiation that falls onto it. No radiation passes through it and none is reflected. It is this lack of both transmission and reflection to which the name refers.
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list of sources of light, including both natural and artificial sources, and both processes and devices.
This is an incomplete list. Please add to this list if you are aware of an omission.
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This is an incomplete list. Please add to this list if you are aware of an omission.
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