Directorios

FÍSICA

 

	Museum of the History of Science
		University of Oxford. «The Museum of the History of Science houses an unrivalled collection of historic scientific instruments in the world's oldest surviving purpose-built museum building, the Old Ashmolean on Broad Street, Oxford. By virtue of the collection and the building, the Museum occupies a special position, both in the study of the history of science and in the development of western culture and collecting.» Reino Unido

	NIST Reference on Constants, Units and Uncertainty
		National Institute of Standards and Technology. «These are the 1998 CODATA recommended values of the fundamental physical constants, the latest CODATA values available.» EEUU - inglés

	Natural Philosophy Collection of Scientific Instruments
		University of Aberdeen, School of Physics. «Our collection represents equipment used for 250 years of teaching and research in Natural Philosophy, the name traditionally used in Scottish Universities for Physics. It is one of the best such collections kept by any Physics Department in Britain, both in respect of the range of subjects covered and the continuity over the past two hundred years. Very little is on public display, due to lack of gallery space, and it is our intention to make more and more of the collection accessible in these pages over the next few years.» Reino Unido

	Particle Generators: At the Intersection of Photography, Science, and Technology
		Photographic Resource Center (PRC) at Boston University. «The particle accelerator, popularly called an atom smasher, is such an image and technology of this astounding technological age. Extending over several miles underground, it produces beams of energetic charged particles and directs them against various targets. Needed to observe objects as small as the atomic nucleus in studies of its structure and of the forces that hold it together, the particle accelerator is also required to provide enough energy to create new particles. A kind of high powered version of our childhood marbles game on the level of atoms, the particle accelerator is one of many phenomenal marriages of technology and science to produce wondrous visions of worlds far beyond the capacity of the unaided eye.» EEUU - inglés

	Physics Museum
		University of Queensland. «Opened in 1988, the Physics Museum displays optical, electrical, acoustical and other scientific equipment plus books, catalogues and instruction manuals. Many date from the University's first year of teaching in 1911. Near-antiques of brass and mahogany sit beside newer but equally obsolete items like electron tubes, spiral slide rules, a computer card punch and sheets of computer magnetic core memory.» Australia

	Radiation Reassessed
		University of Wisconsin, Board of Regents. «The end of the Cold War may have eased the threat of atomic holocaust, but it didn't squelch the controversy about the health effects of ionizing radiation. Some scientists say there's no safe level, others vehemently disagree. Billions of dollars, and thousands of lives, hang in the balance. What do we know about the health effects of low doses of ionizing radiation?» EEUU - inglés

	Ritorno a Volta
		Pavia Project Physics. «Partendo da molteplici tracce che si incontrano sia nella vita quotidiana sia nella ricerca scientifica, la mostra permette al visitatore di ripercorrere gli ultimi secoli verso le origini della scienza elettrica ed in particolare verso le innovazioni, teoriche e sperimentali, di Alessandro Volta. Nel viaggio si incontrano numerosissimi oggetti che hanno popolato il mondo della scienza e della società e che consentono di ripercorrere la storia dell'elettricità, intesa sia come forma di energia facilmente trasportabile sia come veicolo di informazioni; particolare rilievo viene dato ai contributi italiani nei vari settori.» Italia

	Satellites
		Canada's Digital Collections. Government of Canada. «In this site, you can learn everything you ever wanted to know about satellites. Click on "Types and Uses" to find out about different types of satellites, and examples of each. In "Anatomy of a Satellite" you can learn about the parts of a satellite. "Canadian Satellite Q&A" will answer all your questions about what satellites mean to Canada, and tell you about the history of Canada's involvement in space.» Canadá

	Science of Baseball
		Exploratorium. The museum of science, art and human perception. «The central drama in the game of baseball is the confrontation between the pitcher and the batter. In this intense struggle, the pitcher usually wins. A batting average of .333, indicating one hit out of every three times at the plate, is achieved only by the star hitters of the game.» EEUU - inglés

	Science of Cycling
		Exploratorium. The museum of science, art and human perception. «...frame builder Paolo Salvagione assisted in our understanding of bicycle frames and the materials they are made of. The Exploratorium's Paul Doherty helped explain the physics and forces behind the sport of cycling.» EEUU - inglés

	Seeing
		Exploratorium. The museum of science, art and human perception. «On this site you can find information ABOUT the collection, a selection of online EXHIBITS illustrating visual phenomena, a set of pages exploring novel and thought-provoking IDEAS about seeing, and many LINKS to other sites where you can find more information about the science and mystery of how we see the world.» EEUU - inglés

	Selected Papers of Great American Physicists
		American Institute of Physics. The Center for History of Physics. «The roll call is impressive, Franklin, Henry, Gibbs, Rowland, Michelson, Millikan, Compton; a signer of the Declaration of Independence and first great American physicist, a founder and second President of the National Academy of Sciences, the first great American theoretical physicist, the first President of The American Physical Society and the first three American Nobel Prize winners in Physics. The selections stop short of the last fifty years since choices involving living people and their deceased colleagues are difficult to make.» EEUU - inglés

	Skateboard Science
		Exploratorium. The museum of science, art and human perception. «Paul Doherty, Exploratorium staff physicist, explains the physics of ollies, nolies, and kickflips.» EEUU - inglés

	Socket to Me!: How Electricity Came to Be
		IEEE Virtual Museum. «Electricity and magnetism run nearly everything we plug in or turn on. Although it’s something we take for granted, it has taken hundreds of years of experimentation and research to reach the point where we flick a switch and the lights go on.» EEUU - inglés

	Solar Eclipse. Stories From the Path of Totality
		Exploratorium. The museum of science, art and human perception. «To see a total solar eclipse, you have to be in just the right spot on the earth. When you look up in the sky at the sun and the moon, you notice a strange coincidence--both look the same size in the sky. Both the sun and the moon look about one-half degree in diameter. Now, they're not really the same size. The sun's diameter is actually 400 times the moon's diameter. But, you must also take into account that the sun is also 400 times further away from the earth, reducing its apparent size to the same as the moon's.» EEUU - inglés

	Solar Max
		Solar max: The period in the solar cycle during which the number of sunspots is greatest. Exploratorium. The museum of science, art and human perception. «Scientists became aware that the sun went through cycles and changes by observing sunspots, the darker, relatively cooler areas of the sun. The number of sunspots can be an indication of the degree of solar activity. The average number of visible sunspots varies over time, increasing and decreasing on a regular cycle of between 9.5 to 11 years, on average about 10.8 years. An amateur astronomer, Heinrich Schwabe, was the first to note this cycle in 1843.» EEUU - inglés

	Strange Matter
		Developed by the Ontario Science Centre in conjunction with the Materials Research Society and the National Science Foundation. Discover the secrets of everyday stuff. EEUU - inglés

	Sunspots
		Exploratorium. The museum of science, art and human perception. «Dark spots, some as large as 50,000 miles in diameter, move across the surface of the sun, contracting and expanding as they go. These strange and powerful phenomena are known as sunspots.» EEUU - inglés

	Surfing
		Exploratorium. The museum of science, art and human perception. «When you hear the words "technology" and "surfing" in the same sentence, you might think of the internet before you think of the ocean. But those two words go together to help wave riders predict whether worthwhile swells are heading their way. By looking at satellite and climate data that's available on the Web, surfers can follow storms into shore and be there in time to catch the biggest waves.» EEUU - inglés

	The Beat Goes On: How Sounds are Recorded and Played
		IEEE Virtual Museum. «What is sound? Sounds are really just rapidly vibrating waves in the air. Those waves make our eardrums vibrate, but instead of feeling the vibrations, our brains translate them into sounds. Translating waves from one form to another is also a key to understanding sound recording technologies. In the 1800s, many scientists studied sound waves and human hearing. Some of them, such as Eduoard-Leon Scott de Martinville and Alexander Graham Bell, constructed machines called Phonautographs to capture the waves and translate them into visible form—drawings on paper or on a sheet of smoked glass.» EEUU - inglés

	The Discovery of Global Warming
		American Institute of Physics. The Center for History of Physics. «A hypertext history of how scientists came to (partly) understand what people are doing to change the Earth's climate.» EEUU - inglés

	The Discovery of the Electron
		American Institute of Physics. The Center for History of Physics. «Experiments by J.J. Thomson in 1897 led to the discovery of a fundamental building block of matter.» Reino Unido

	The Great Magnet, the Earth
		By David P. Stern. «Commemorating the 400th anniversary of "De Magnete" by William Gilbert of Colchester.» EEUU - inglés

	The Heart of the Matter
		Inside CERN, the world's largest particle accelerator. The European Center for Nuclear Research. Exploratorium. The museum of science, art and human perception. «A new site exploring the history, people, and landscape of this research facility and the scientific and cultural ideas that emerge.» EEUU - inglés Francia Internacional Suiza

	The Noble Dane: Images of Tycho Brahe
		Museum of the History of Science, Oxford. «Tycho himself, perhaps more than any other mathematician of his time, fashioned his own image, through the account of his observatory published in the Astronomiae instauratae mechanica of 1598 and 1602, through other publications printed on his own presses, and through his instruments.» Reino Unido

	The Satellite Site
		The Tech Museum of Innovation. «In this exhibit we'll look at the man-made satellites that orbit Earth and the Sun -- highly specialized tools that do thousands of tasks every day. Each of these satellites has many parts, but two parts common to all satellites are called the payload and the bus.» EEUU - inglés

	Theater of Electricity
		Museum of Science. «The Museum of Science is home to the world's largest air-insulated Van de Graaff generator. The generator was generously donated to the Museum by the Massachusetts Institute of Technology. Designed and built by Dr. Robert J. Van de Graaff, who was a professor at MIT, this generator was originally used as a research tool in early atom-smashing and high energy X-ray experiments. As newer methods of atomic acceleration became available, the machine was used for instructional purposes only. Finally, it was donated to the Museum, where it now stands on public display in the center of the Thomson Theatre of Electricity and is demonstrated daily.» EEUU - inglés

	Thomas Edison: A Lifetime of Invention
		IEEE Virtual Museum. «Much of modern-day technology owes some debt to the work of Thomas Alva Edison. His inventions such as an incandescent lighting system, the phonograph, motion pictures, and nearly countless, lesser known others laid the foundation for the explosive growth of technology that defined the 20th century. His dizzying array of inventions dazzled his contemporaries, who called him a wizard, and frustrated his rivals, who found competing against Edison a serious business.» EEUU - inglés

	Transistorized! - History of the Transistor
		American Institute of Physics. The Center for History of Physics. «The Transistor was probably the most important invention of the 20th Century, and the story behind the invention is one of clashing egos and top secret research.» EEUU - inglés

	Turbulent Landscapes
		Exploratorium. The museum of science, art and human perception. «Turbulent Landscapes is made up of 21 exhibits, 18 graphic stands, seven curved walls, a credit and introduction wall, 6 full benches (each in two sections), and an optional audio tour (with check-out desk). You can see the exhibit and read descriptions and comments for each exhibit.» EEUU - inglés

	Universe from Canada
		Canada's Digital Collections. Government of Canada. «There is no field of study more all-encompassing than astronomy, and it is one at which a great many Canadians have excelled. Astronomy is a science in which anyone may meaningfully participate, given enough patience, determination and maybe even a little luck.» Canadá

	Welcome to the Science of Hockey
		Exploratorium. The museum of science, art and human perception. «One of the most unique aspects of hockey is the surface on which the game is played: the ice itself. The players talk about the quality of the ice; they've helped coin the terms "fast ice" and "slow ice." Scientists, on the other hand, are still studying the chemistry of the ice. In just the last few years, there have been major discoveries which have changed our understanding about the nature of the ice.» EEUU - inglés

	Werner Heisenberg and Uncertainty
		American Institute of Physics. The Center for History of Physics. «Werner Heisenberg (1901-1976) was one of the greatest physicists of the twentieth century. He is best known as a founder of quantum mechanics, the new physics of the atomic world, and especially for the uncertainty principle in quantum theory. He is also known for his controversial role as a leader of Germany's nuclear fission research during World War II. After the war he was active in elementary particle physics and West German science policy.» Alemania

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