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Topic: Black body


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In the News (Fri 24 May 19)

  
  Black body - Wikipedia, the free encyclopedia
As the temperature decreases, the peak of the fl body radiation curve moves to lower intensities and longer wavelengths.
In physics, a fl body is an object that absorbs all electromagnetic radiation that falls onto it.
The hole then is a close approximation of a theoretical fl body and if the cavity is heated, the spectrum of the hole's radiation (i.e., the amount of light emitted from the hole at each wavelength) will be continuous, and will not depend on the material in the cavity (compare with emission spectrum).
en.wikipedia.org /wiki/Black_body   (1866 words)

  
 Planck's law of black body radiation - Wikipedia, the free encyclopedia
In physics, the spectral intensity of electromagnetic radiation from a fl body at temperature T is given by Planck's law of fl body radiation:
At the time, Planck believed that the quantization applied only to the tiny oscillators that were thought to exist in the walls of the cavity (what we now know to be atoms), and made no assumption that light itself propagates in discrete bundles or packets of energy.
Contrary to another myth, Planck did not derive his law in an attempt to resolve the "ultraviolet catastrophe", the name given to the paradoxical result that the total energy in the cavity tends to infinity when the equipartition theorem of classical statistical mechanics is applied to fl body radiation.
en.wikipedia.org /wiki/Planck's_law_of_black_body_radiation   (1024 words)

  
 1.7 Black Body Radiation   (Site not responding. Last check: 2007-11-05)
A fl body is matter which absorbs all electro-magnetic energy incident upon it and does not reflect nor transmit any energy.
Black body radiation is defined as thermal radiation of a fl body, and can be given by Plank's law as a function of temperature T and wavelength as shown in Figure 1.7.1 and Table 1.7.1.
The temperature of the fl body which radiates the same radiant energy as an observed object is called the brightness temperature of the object.
www.profc.udec.cl /~gabriel/tutoriales/rsnote/cp1/cp1-7.htm   (363 words)

  
 black body. The Columbia Encyclopedia, Sixth Edition. 2001-05   (Site not responding. Last check: 2007-11-05)
Since a fl body is a perfect absorber of radiant energy, by the laws of thermodynamics it must also be a perfect emitter of radiation.
The distribution according to wavelength of the radiant energy of a fl body radiator depends on the absolute temperature of the fl body and not on its internal nature or structure.
In thermodynamics the principle of the fl body is used to determine the nature and amount of the energy emitted by a heated object.
www.bartleby.com /65/bl/blackbod.html   (391 words)

  
 Blackbody Radiation   (Site not responding. Last check: 2007-11-05)
A fl body is a theoretical object that absorbs 100% of the radiation that hits it.
As the temperature increases, the peak wavelength emitted by the fl body decreases.
His idea was that the oscillating electrons of the surface atoms of the fl body emitted radiation according to Maxwell's laws of electromagnetism.
www.egglescliffe.org.uk /physics/astronomy/blackbody/bbody.html   (1885 words)

  
 Black Body   (Site not responding. Last check: 2007-11-05)
Black body by definition is an object that absorbs all radiation falling on it or in other words it has an absorptivity equal to unity.
Applying the Kirchoff's law to a fl body results in that it should have an emissivity of unity i.e.
A close approximation to a fl body is a hole leading to a chamber.
www.taftan.com /thermodynamics/BLACK.HTM   (122 words)

  
 Body
Body Count - The thickness of your skin varies from 1/2 to 6 millimeters, depending on the area of your body.
body snatching - body snatching, the stealing of corpses from graves and morgues.
fl body - fl body, in physics, an ideal fl substance that absorbs all and reflects none of the radiant...
www.factmonster.com /ipka/A0768612.html   (117 words)

  
 Black Body   (Site not responding. Last check: 2007-11-05)
From Algeria to the Antipodes, the female fl body, when viewed through the colonial lens, represents all that is dangerous and unknown in an alien land.
Mohanram's emphasis on space brings out the connections among various strands in postcolonial studies: the politics of displacement, the concept of diasporic identity versus indigenous identity, the identity of woman in the nation and the spatial construction of femininity, the association of the fl body with nature and landscape and the white body with knowledge.
The relationship between the female fl body and the white male body effectively and tellingly parallels the relationship between the two hemispheres.
www.upress.umn.edu /Books/m/mohanram_black.html   (257 words)

  
 Sweet Sunnah Black Seed
BLACK SEED is phytotherapuetic (Herbal medicine) and has been known to reduce your risk to illness and disease by strengthening your immune system and protecting your body’s most important organs.
Black Seed (Nigella sativa) appropriately known as the "seed of blessing” is considered to be one of the greatest healing herbs of all times.
Because they are absorbed directly into the body through the skin, we only use ingredients that we trust while continuing to reject a wide range of commonly used ingredients that are harsh, irritating, or in some cases toxic and cancer-causing.
www.sweetsunnah.com   (982 words)

  
 Black women & body image
Wallace-Sanders is one of five fl female scholars who will be holding forth on the voluptuousness of African-American women, cultural perceptions of fl female body types and standards of feminine beauty at the 11th annual Black Women's Conference next week at the University of Kentucky.
This year's theme is "Black Women and the Body." Yolanda Pierce, the conference organizer and UK assistant professor of English and African American Studies, said the theme "reflects the need to examine the perceptions and misperceptions about body issues for women of color.
Black women's bodies have historically been on public display, but in ways that have been stereotypical and biased.
www.courier-journal.com /apps/pbcs.dll/article?AID=/20050320/FEATURES/503200316/1010   (1477 words)

  
 :: NASA Quest > Archives ::   (Site not responding. Last check: 2007-11-05)
an ideal or imaginary body that is absolutely fl when cold, but is a perfect absorber of radiation and at the same time a perfect radiator.
Black body temperatures are used to work out the theoretical laws of radiation and to calculate the temperature of the sun.
An hour circle moves with the body as the celestial sphere rotates, unlike the celestial meridian of a point that remains fixed.
quest.arc.nasa.gov /mars/background/glossary.html   (1360 words)

  
 Black Body Distribution
The curve above is the radiation-distribution curve for a mathematical idealization known as a 'fl body' (or 'Planck's curve)—an object that absorbs all radiation falling upon it.
In a steady state, a fl body must re-emit the same amount of energy as it absorbs; the fl-body curve shown in the image describes the distribution of that re-emitted radiation.
It implies that the energy emitted by a body rises dramatically as the body's temperature increases.
hea-www.harvard.edu /~efortin/thesis/html/Black_body.shtml   (907 words)

  
 Black Body Radiation
There was a general understanding of the mechanism involved -- heat was known to cause the molecules and atoms of a solid to vibrate, and it was known that the molecules and atoms were themselves complicated patterns of electrical charges.
Recall that the experimental measurement of fl body radiation from the oven detects the intensity of radiation in a given frequency range.
The graphs of fl body radiation as a function of temperature were generated using an Excel spreadsheet.
galileo.phys.virginia.edu /classes/252/black_body_radiation.html   (3762 words)

  
 The Black Female Body: A Photographic History by Deborah Willis and Carla Williams (2002). Carlagirl Photo.
In Europe in the nineteenth century, the body of the fl female symbolized three themes: colonialism, scientific evolution, and sexuality, and her representation in art and photography followed along these prescribed lines.
Black photographers in the 1960s and 1970s organized exhibitions on fl art, exploring the beauty of fls and fl heritage.
Black photographers framed their photographs, especially the image of the fl female nude, with a sense of pride in African ancestry informed by sexual desire and racial identity.
www.carlagirl.net /read/bfb.html   (1127 words)

  
 Is It Really Sonny Black's Body?
Privately, however, they’re much less certain about that and it could prove to be very troubling at the upcoming murder and racketeering trial of family boss Joseph Massino, who is charged with serving as a backup shooter in Napolitano’s execution a year earlier.
The 22-year-old murder of Sonny Black is the centerpiece of the government’s case against Massino.
And while prosecutors don’t need a dead body to prove a murder, especially in federal court, once they allege they have found the victim, it would severely undermine them if defense lawyers can show that assertion to be dead wrong.
www.ganglandnews.com /column340.htm   (1252 words)

  
 Black Body (Re)radiation   (Site not responding. Last check: 2007-11-05)
For a fl object, changing heat to light is easier for the same reason.
A flbody is a body that emits radiation according to Plank's Law.
When you refer to a "fl vs. white body" you mean what is the distribution of wavelengths of light that are REFLECTED by an object.
www.newton.dep.anl.gov /askasci/phy00/phy00507.htm   (481 words)

  
 Scarring the Black Body Race and Representation in African American Literature Carol E. Henderson
In Scarring the Black Body, Carol E. Henderson analyzes the cultural and historical implications of scarring in a number of African American texts that feature the trope of the scar, including works by Sherley Anne Williams, Toni Morrison, Ann Petry, Ralph Ellison, and Richard Wright.
The first part of Scarring the Black Body, "The Call," traces the process by which African bodies were Americanized through the practice of branding.
Henderson explores Williams's reinvention of the whip-scarred body in her novel Dessa Rose and provides a close analysis of Morrison's use of scar imagery in Beloved.
www.umsystem.edu /upress/fall2002/henderso.htm   (362 words)

  
 Chemical Sciences: Laws of Black-Body Radiation
Our sun emits radiation very similar to that of a fl body at 6000 K; the much hotter blue-white star Sirius emits radiation very similar to that of a fl body at 11000 K. These temperatures are believed to be the actual surface temperatures of the stars.
Experimentally, a nearly ideal fl body is not difficult to construct.
As indicated earlier, the light emitted by a fl body is a continuous spectrum of all wavelengths.
www.psigate.ac.uk /newsite/reference/plambeck/chem1/p01212.htm   (737 words)

  
 blackstar body piercing and body jewelry: BlackStar body piercing studio web site entry page.   (Site not responding. Last check: 2007-11-05)
BlackStar Body Piercing is a Canadian company dedicated to delivering high quality body jewelry and body piercing services to our clients, and to improving the level of knowledge and skill within the body piercing community.
This site is an information resource to be used both by the public and by the professional body piercer.
Body Piercing Aftercare pages start with the philosophy of piercing aftercare and aftercare theory, and will give you straight answers about the short term and long term care of various specific body pirercings.
www.blackstar.on.ca   (294 words)

  
 PopMatters | Columns | Lynne d Johnson | Black Thoughtware | Technosoul: They Sing The Black Body Electric
The machinic fl music, that is the true symbiosis of man and machine, is the fl music of the future.
The mass distribution center of fl popular music doesn't know how to sell this music as R&B. And somehow not being able to sell it, ends up meaning that this "otherwordly" music is not speaking for the fl soul.
That posthuman is not concerned with the human that is connected to the "fl singing voice" as the purveyor of the fl soul.
www.popmatters.com /columns/johnson/031015.shtml   (1396 words)

  
 Deborah Willis, Carla Williams: The Black Female Body - Print
In the nineteenth century, fl women were rarely subjects for artistic studies but posed before the camera again and again as objects for social scientific investigation and as exotic representatives of faraway lands.
As highly educated fl women who are also trained artists they bring an informed and sensitive perspective to a subject that has never before been studied from a historical and aesthetic viewpoint.
Deborah Willis is Professor of Photography in the Tisch School of the Arts, NYU and the author of Reflections in Black: A History of Black Photographers, 1840 to the Present.
www.temple.edu /tempress/titles/1356_reg_print.html   (1135 words)

  
 Halloween Flashing LED Magnetic Body Lights: Black Bat LED Flasher
The Flashing Magnetic Black Bat Body Light comes with two magnets to attach it to an object, Halloween costume or your shirt and includes replaceable batteries so you can use for a lot of scary Halloween's to come.
To turn the magnetic body light off, unscrew the cap until contact is broken.
To wear the magnetic body light as a pin, attach the body light to your shirt with the magnets on the inside of your shirt and the activated body light on the outside.
glowproducts.com /magneticbodylights/bat   (194 words)

  
 Montreal Mirror - Visual Arts: Black Body
Edmonds says the purpose of the exhibit is twofold: to expose more people of colour to the art world, and to have everyone who sees the works question their own perceptions.
Chambers says he initially chose to focus his photography on the fl body because he felt the medium needed a fl viewpoint.
Among the pieces on display at the MAI are “Bullseye,” which depicts a nude fl man with a bull’s-eye on the back of his head, and “SoundShut,” a photograph of a nude fl man with his mouth wired shut.
www.montrealmirror.com /ARCHIVES/2003/013003/visualarts.html   (549 words)

  
 Black Car - Body Panels
Black Car has thousands of body panels in stock for 1950's to mid-1980's cars and trucks.
We have one of the largest obsolete body panel inventories in the country.
Many of the panels were discontinued being manufactured years ago, therefore many of these panels cannot be replaced.
www.blackcar-llc.com /body_panels.htm   (384 words)

  
 BLACK-BODY PROBLEMATIC:
GENESIS AND STRUCTURE
The oppositions, dualisms, contrasts or inversions between theories, principles, laws and models form the framework of the fl- body problem and the subsequent quantum innovation.
Cassirer argues that in the nineteenth century the particular problem that gave rise to a new development of thought was the second law of thermodynamics and its conflict with the prevailing mechanical world view.
Recourse to the body of journal literature, the medium through which natural scientists report their original work, assess and evaluate that done by others and often modify their own work, immediately casts doubt upon Kuhn’s implications of the standard textbook schema of scientific progress in terms of paradigms and revolutions.
theoryandscience.icaap.org /content/vol003.001/roy.html   (5927 words)

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