Blackbody Radiation
All objects with a temperature above absolute zero (0 K, -273.15 oC) emit energy in the form of electromagnetic radiation.
Definition: blackbody radiation: Blackbody radiation is produced by an object which is a perfect absorber of heat. Perfect absorbers must also be perfect radiators.
Similarly, black objects emit more heat radiation, which is probably the origin of the term 'black body radiation'. Planck's explanation of the energy distribution of blackbody radiation was one of the first steps toward quantum mechanics .
blackbody radiation
The radiation -- the radiance at particular frequencies all across the spectrum -- produced by a blackbody -- that is, a perfect radiator (and absorber) of heat.
Blackbody Radiation - The electromagnetic radiation emitted by a blackbody. The spectrum and intensity of blackbody radiation are controlled by the temperature of the blackbody. Many stars and other celestial bodies approximate blackbodies ...
Blackbody Radiation
(a) Radiation whose spectral intensity distribution is that of a blackbody in accordance with Planck's law. (sometimes called thermal radiation) ...
Blackbody radiation is light in thermal equilibrium, light radiation with a given temperature. It is the basic thermodynamic state of light.
Blackbody radiation is the result of
[A] particles interacting with a magnetic field
[B] particles annihilating with other particles
[C] particles interacting with photons so that thermalization occurs ...
Blackbody radiation; radiation caused by the high temperature of the radiating objects, as opposed to nonthermal radiation, which is caused by energetic (not necessarily hot) electrons. [H76]
Thermalization ...
- Blackbody Radiation - the solution to the famous blackbody radiation experiment
- Surveyor - Lunar Missions
- "Freelancer" Space Sim Game - Game Info, Demo, Cheats, Movie ...
2. Blackbody radiation is an example of a _____ spectrum. HINT
3. Fraunhofer discovered absorption lines in the _____. HINT
4. A continuous spectrum can be produced by a luminous solid, liquid, or _____ gas. HINT ...
The first kind of light emission we will consider is the so-called ``thermal emission'' or blackbody radiation. A blackbody is defined to be a perfect thermal emitter---it would be black because an ideal emitter would also be an ideal absorber.
The radiation escaping through such a perforation will be a good approximation to blackbody radiation at the temperature of the interior of the container.
1934 - Richard Tolman shows that blackbody radiation in an expanding universe cools but remains thermal
1941 - Andrew McKellar uses the excitation of CN doublet lines to measure that the "effective temperature of space" is about 2.3 K ...
Blackbody radiation is an important type of light emission.
The Stefan-Boltzmann law, and Wien's law describe blackbody radiation. How are they useful for the study of stars?
Spectroscopy is the examination of the detailed spectrum of light.
The wavelength or frequency distribution of blackbody radiation was studied in the 1890s by Wilhelm Wien of Germany. It was his idea to use as a good approximation for the ideal blackbody an oven with a small hole.
At the same time, investigations of blackbody radiation carried out over four decades (1860-1900) by various researchers culminated in Max Planck's hypothesis that the energy of any system that absorbs or emits electromagnetic radiation of frequency ...
STEFAN-BOLTZMANN LAW - Law of blackbody radiation that states that the amount of energy given off by a blackbody per second per unit area (flux) is proportional to the fourth power of the temperature of the blackbody.
This effect, known as blackbody radiation, happens to all objects, regardless of it's temperature.
Thermal emission: Radiation emitted due to an object's temperature (e.g., blackbody radiation) or by an ionized gas.
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 See also: Blackbody, Energy, Light, Temperature, Field
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