21. Sonoluminescence: Facts, Discussion Forum, And Encyclopedia Article A bubble is a globule of one substance in another, usually gas in a liquid.Due to the Marangoni effect, bubbles may remain intact when they reach the surface of the immersive http://www.absoluteastronomy.com/topics/Sonoluminescence

Home Discussion Topics Dictionary ... Login Sonoluminescence Sonoluminescence Topic Home Discussion Overview Sonoluminescence is the emission of short bursts of light Light Light is electromagnetic radiation of a wavelength that is visible to the human eye... from imploding bubble Liquid bubble A bubble is a globule of one substance in another, usually gas in a liquid.Due to the Marangoni effect, bubbles may remain intact when they reach the surface of the immersive substance.-Common examples:... s in a liquid Liquid Liquid is one of the three classical states of matter. Like a gas, a liquid is able to flow and take the shape of a container, but, like a solid, it resists compression. Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density... when excited by sound Sound Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.- Perception of sound... The effect was first discovered at the University of Cologne University of Cologne The University of Cologne is one of the oldest universities in Europe and, with over 44,000 students, one of the largest universities in Germany. The university is part of the Deutsche Forschungsgemeinschaft, an association of Germany's leading research universities...

22. Sonoluminescence - Turning Sound Into Light Scientists have been able to change one form of energy into another even with acoustical energy. sonoluminescence - Turning sound into light. http://www.buzzle.com/editorials/2-26-2006-89869.asp

Home World News Latest Articles Escape Hatch ... Endless Buzz Sonoluminescence - Turning sound into light Scientists have been able to change one form of energy into another - even with acoustical energy. Sonoluminescence Turning SOUND into LIGHT "And God SAID, 'Let there be light', and there was light" Gen. 1:3 Around the 1920's the technology of Sonar was first being introduced to the world. In use with detecting enemy submarines in WW I, it was fast becoming a much-needed scientific breakthrough. However, as with many laboratory experiments, unusual phenomena had been observed - giving way to a completely new field - which we today call Sonoluminescence. Definition Sonoluminescence is the unique ability of turning sound into light. It was first stumbled upon in 1934 by H. Frenzel and H. Schultes of the University of Cologne, Germany.* Essentially, it is the ability of acoustical energy bombarding molecules of water. But the results of such an action, taking into consideration much controlled conditions, is fantastically more intense than one may presume at first glance. For the action that takes place is to compress a bubble of air trapped in water to 1,000,000,000,000 it's own weight! Once this is accomplished, a flash of ultraviolet light - lasting only picoseconds, with the air bubble become hotter than the surface of the sun. Not only are the mind boggling facts cited above enough to make the average head swim, but also consider the fact that the acoustical energy that bombards this air bubble is concentrated so as to amplify it 1,000,000,000,000 (One trillion) times! Such a phenomenon can cause this process of turning sound into light over 30,000 times a second.

23. The Chemical And Physical Effects Of Ultrasound Provides background on how sonoluminescence can be used in chemistry. http://www.scs.uiuc.edu/suslick/execsummsono.html

24. Sonoluminescence - Definition Of Sonoluminescence By The Free Online Dictionary, son o lu mi nes cence (s nl m-n s ns) n. The production of light as a result of the passing of sound waves through a liquid medium. The sound waves cause the formation of bubbles http://www.thefreedictionary.com/sonoluminescence

25. YouTube - Sonoluminescent Bubble Lighted With Laser Shiny bubble of Single Bubble sonoluminescence lighted with laser during fixation of optical system. http://www.youtube.com/watch?v=3bfJploSBgM

26. Single Bubble Sonoluminescence HOWTO Provides detailed instructions on how to produce single and multi bubble sonoluminescence. http://www.physik3.gwdg.de/~rgeisle/nld/sbsl-howto.html

Reinhard's Experimental Physics Letters (unpublished) 5/1996 Single Bubble Sonoluminescence HOWTO What's this all about? There are many papers about the theory of Single Bubble Sonoluminescence available, but exact descriptions how to produce it are rare. So if you already know about sonoluminescence and now want to reproduce it, this is the right place to look at. I tried to give a complete and detailed report of the steps towards SBSL. Any suggestions, supplementations, comments are welcome... This experiment may be dangerous. Always think before you work. Working with vacuum or boiling water can cause explosions. High voltages are generated in this experiment. I will not be responsible for any injuries or damaged equipment. If you don't know what you are doing just don't do it at all. And: No, I am also not responsible for any thermonuclear accident you trigger. Equipment (required): sine generator: any function generator working around 25 kHz, adjustable to +/- 1 Hz (+/- 10 Hz may work, too) amplifier: nearly any kind of audio amplifier will do. If you're not sure, measure the saturation voltage: 40 V peak-to-peak should be enough.

27. SONOLUMINESCENCE A conventional engineer's assessment of Keely and his discoveries in the light of today's knowledge of physics http://www.keelytech.com/sonoluminescence.html

Sonoluminescence The following article I found on the net. Unfortunately I have not yet been able to find out its author and cannot give credit, which is evidently due, because the article is telling and accurate. It is true that Keely does talk about the phenomenon, which is interesting, because it was not until 1934 that it was re-discovered at the University of Cologne as a result of work on sonar. But no more comment, here it is: SONOLUMINESCENCE Keely's work also involved the idea that when water was vibrated at certain frequencies, visible light would emerge within it. He tied this in with the properties of sound to harness the aetheric energies. This phenomenon has now been duplicated through an experiment that is known as "Sonoluminescence." In this experiment, a spherical flask that is filled with water is vibrated at a certain frequency, low in pitch but very high in strength. In the below image we see a simple laboratory setup for this process, with the spherical flask in a clamp and high-intensity speakers mounted to either side of the sphere, with red power wires attached. Photo from William Andrew Steer's laboratory research.

28. Achieving SBSL Sarah Webb's research pages sonoluminescence and aerosol spectroscopy http://physics.open.ac.uk/~swebb/ach.htm

Achieving Sonoluminescence Serious Stuff SBSL My web pages Brief guide Achieving SBSL Experiment Proposals Useful Links Aerosols My web pages About Aerosols Our Experiment Preliminary Results Useful Links Teaching and Tutoring To be made This page gives a brief outline of the physics behind sonoluminescence and the method used to achieve it. Figure 1: A piezoelectric transducer. Water is the substrate that most readily emits light so the first step to achieving sonoluminescence is to create a suitable sample. As a control to the experiment distilled water must be used. To get a suitable gas level in the water it is necessary to steadily boil it for approximately 11 minutes. The 100ml of water should be degassed in two equal parts to stop splashing whilst the water is boiling. The flask must be sealed with a rubber bung immediately after the heat is removed to prevent gases being reabsorbed. The water should then be left to cool to room temperature and preferably cooled even further in a fridge before the experiment is conducted. Piezo-electric transducers (P.Z.T.s) are used to create the acoustic field. These are ceramic devices that expand when a potential difference is imposed across one way and contract when a voltage is imposed across the other way. They need a voltage of around 700V to work efficiently. If subjected to an A.C. potential they will expand and contract rapidly. If they are glued to the side of the sonoluminescence flask and wired in parallel they will cause the flask to vibrate thus producing the required acoustic field.

29. Theory Of Operation sonoluminescence kits ready to run Single bubble sonoluminescence (SL) is the spontaneous emission of picosecond pulses of broadband light from a micronsize gas bubble levitated http://www.sonoluminescence.com/intro.html

Theory of Operation Single bubble sonoluminescence (SL) is the spontaneous emission of picosecond pulses of broadband light from a micron-size gas bubble levitated in water by the application of an external sound field.The bubble expands and contracts in phase with the oscillating pressure field. Much of the recent work on single bubble sonoluminescence has been concerned with the dynamics of the bubble motion and the detailed spectrum in the 200 to 700 nm range using a variety of gas mixtures as the contents of the sonoluminescing bubble. Recent theoretical work with shock wave focusing in the bubble has given peak temperatures up to 10^9 K, while other estimates place the peak temperature in the range of 10^4 to 10^6 K. The mechanism for the light emission is still not understood. There is general agreement that the violent collapse of a micron size bubble to its hard core limit is at the heart of the light emission process. The following picture shows the light given off by 2 bubbles trapped in the [1,1,3] mode of a rectangular cell. The frequency at which the light is being emitted is 28.3 kHz.

30. Tatrocki, P. (2006). Difficulties In The Sonoluminescence Theory Based On Quantu Paper by Pawel Tatrocki discussing some effects which could be observed and are difficult to explain by the sonoluminescence theory developed by C. Eberlein. http://philica.com/display_article.php?article_id=19

31. Sonoluminescence (physics) -- Britannica Online Encyclopedia Email is the email address you used when you registered. Password is case sensitive. If you need additional assistance, please contact customer support. http://www.britannica.com/EBchecked/topic/554552/sonoluminescence

document.write(''); Search Site: Advanced Search With all of these words With the exact phrase With any of these words Without these words Home SHOP BROWSE BLOG ... HELP Username: Password: Remember me Forgot your password? Help Email " is the e-mail address you used when you registered. Password " is case sensitive. If you need additional assistance, please contact customer support Enter the e-mail address you used when enrolling for Britannica Premium Service and we will e-mail your password to you. sonoluminescence My Britannica CREATE MY sonoluminesc... NEW ARTICLE ... SAVE sonoluminescence Table of Contents: sonoluminescence Article Article Related Articles Related Articles Citations Article Related Articles Citations LINKS Related Articles Aspects of the topic sonoluminescence are discussed in the following places at Britannica. Assorted References cavitation in ultrasonics (physics): Applications in research ...the cavitation process and its applications. A contemporary subject of research involves emission of light as the cavity produced by a high-intensity ultrasonic wave collapses. This effect, called sonoluminescence, is believed to create instantaneous temperatures hotter than the surface of the Sun. nuclear fusion in nuclear fusion (physics): Cold fusion and bubble fusion ...reactions (neutrons and tritium) during acoustic cavitation experiments with chilled deuterated (bombarded with deuterium) acetone. Their experimental setup was based on the known phenomenon of sonoluminescence. In sonoluminescence a gas bubble is imploded with high-pressure sound waves. At the end of the implosion process, and for a short time afterward, conditions of high density and...

32. Boosting Sonoluminescence Accepted for publication in 1996, this paper describes how a bimodal sound excitation can enhance light production. http://www.physik.tu-darmstadt.de/~hofu/paper/boosting/main.html

33. Sonoluminescence On Myspace Music - Free Streaming MP3s, Pictures & Music Downlo Myspace Music profile for sonoluminescence. Download sonoluminescence Experimental / Blues / Jazz music singles, watch music videos, listen to free streaming mp3s, read http://www.myspace.com/sonoluminescense

34. [hep-th/9901011] The Casimir Effect: Physical Manifestations Of Zero Point Energ Describes the connection between the Casimir effect and sonoluminescence. Full text in PDF, PS and DVI file formats. http://arxiv.org/abs/hep-th/9901011

arXiv.org hep-th Search or Article-id Help Advanced search All papers Titles Authors Abstracts Full text Help pages Full-text links: Download: PDF PostScript Other formats Current browse context: hep-th new recent SLAC-SPIRES HEP refers to ... what is this? Bookmark what is this? High Energy Physics - Theory Title: The Casimir Effect: Physical Manifestations of Zero Point Energy Authors: Kimball A. Milton (Submitted on 4 Jan 1999) Abstract: Zero-point fluctuations in quantum fields give rise to observable forces between material bodies, the so-called Casimir forces. In these lectures I present the theory of the Casimir effect, primarily formulated in terms of Green's functions. There is an intimate relation between the Casimir effect and van der Waals forces. Applications to conductors and dielectric bodies of various shapes will be given for the cases of scalar, electromagnetic, and fermionic fields. The dimensional dependence of the effect will be described. Finally, we ask the question: Is there a connection between the Casimir effect and the phenomenon of sonoluminescence? Comments: 55 pages, 4 ps figures, Invited Lectures at 17th Symposium on Theoretical Physics, Seoul National University, Korea, June 29-July 1, 1998

35. What Is Sonoluminescence? Brief and Straightforward Guide What is sonoluminescence? sonoluminescence is a mysterious phenomenon caused when ultrasound waves excite a liquid, creating tiny bubbles http://www.wisegeek.com/what-is-sonoluminescence.htm

36. Tabletop Nuclear Fusion Claims Meet With Skepticism: Scientific American Article from Scientific American providing an explanation of why it is unlikely that sonoluminescence produces the conditions necessary to initiate or facilitate nuclear fusion. http://www.scientificamerican.com/article.cfm?id=tabletop-nuclear-fusion-c

37. Page 3: Sonoluminescence sonoluminescence. For an account at the level of a science graduate please see the article in Physics World on this site. For an account at the level of an undergraduate please http://www.physics.ucla.edu/Sonoluminescence/page3.html

Sonoluminescence For an account at the level of a science graduate please see the article in Physics World on this site. For an account at the level of an undergraduate please see the Scientific American article at this site. Detailed reviews are Physics Reports , Barber et al march 1997 and Annual Reviews of Fluid Mechanics Putterman and Weninger 2000. For history see the above articles and the thesis of Lofstedt UCLA 1995, and a letter to Physics World August 1999 at this site. We believe that the photo of a single light emitting bubble moving in a torus generated the appearance of a shuttlecock as reported in the thesis of Paul R. Temple U. Vermont 1970 who we credit with the first observation of sonoluminescence from a single bubble. Latest results include the use of a streak camera to observe the emission of an outgoing shock wave from the sonoluminescing bubble. In a 16KHz sound field the strength of the shock wave approaches 1 Million Atmospheres. Two color plates and a black and white show the experiment and data. Physical Review E 2000. Sonoluminescence has found use in synchronizing photodetector arrays for the solar neutrino observatory and in plastic surgery.

38. Sonoluminescence sonoluminescenceFrom WikipediaLong exposure image of multibubble sonoluminescence created by a high-intensity ultrasonic horn immersed in a beaker of liquidAnother long http://www.docstoc.com/docs/21849846/Sonoluminescence

39. NCPA A research center on the University of Mississippi campus that specializes in the physics of acoustics, including sonoluminescence, resonant ultrasound spectroscopy, outdoor sound, nonlinear acoustics, land mine detection, and agroacoustics. http://www.olemiss.edu/depts/ncpa/

Home About Introduction Mission ... Links News: Significant reduction in Jet Noise UM gets $1M for energy research Events: PASS 2010 LRSP Army HLVTD Workshop Welcome to NCPA! UM Home NCPA Webmaster

40. Teachspin - Sonoluminescence Advanced Laboratory Equipment sonoluminescence Brochure Introduction sonoluminescence is the production of light from sound. This effect, discovered just over ten years ago, has been, and continues http://www.teachspin.com/instruments/sonoluminescence/index.shtml

home about us unique support users ... individual parts Sonoluminescence introduction the instrument experiments specifications accessories ... Sonoluminescence Brochure Introduction Sonoluminescence is the production of light from sound. This effect, discovered just over ten years ago, has been, and continues to be, the subject of considerable experimental and theoretical research. The bubble collapse is so violent that some predicted theoretical accelerations are larger than those associated with a Black Hole! The actual emission mechanism has not yet been explained, although theories are as plentiful as they are diverse. Students begin their exploration by first understanding some basic acoustical principles, such as resonance behavior, quality factors, variation of sound speed with temperature, and the eigenmode structure of a 3-dimensional resonance "cavity." Once these principles are understood there are a large number of experiments that can be performed focusing on the liquid sample preparation and the light emitted from the bubble. introduction the instrument experiments specifications accessories ... prices

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 2     21-40 of 63    Back | 1  | 2  | 3  | 4  | Next 20