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Biocrawler:Wikiportal/Physics

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Physics portal
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An artist's impression of an  of hot  orbiting a black hole (from ).

Physics (from the Greek, φυσικός (physikos), "natural", and φύσις (physis), "Nature") is the science of Nature in the broadest sense. Physicists study the behavior and properties of matter in a wide variety of contexts, ranging from the sub-microscopic particles from which all ordinary matter is made (particle physics) to the behavior of the material Universe as a whole (cosmology).

Featured article
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Charles Bennett examines three "cold fusion" test cells at the Oak Ridge National Laboratory
Cold fusion is the name for a nuclear fusion reaction that occurs well below the temperature required for thermonuclear reactions — such reactions may occur near room temperature and atmospheric pressure, and even in a relatively small experiment. The term was coined by Dr. Paul Palmer of Brigham Young University in 1986 in an investigation of the possible existence of fusion in a planetary core. It was brought into popular consciousness by the controversy surrounding the Fleischmann-Pons experiment in 1989. Unfortunately, no "cold" fusion experiments that gave an otherwise unexplainable net release of energy have so far been reproducible.
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2D analogy to a wormhole.
Did you know
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the Cherenkov effect in a swimming pool

...that gravitational tidal accelerations are the result of the curvature of spacetime?
...that the impact of a raindrop would be fatal if not for the notion of terminal velocity?
...that a moonbow, or night-time rainbow, can be seen on strongly-moonlit nights?
...that transits of Venus occur in a 243-year cycle?

...that the blue glow of the Cherenkov effect is due to electrons moving faster than the speed of light in water?
Where to start
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Theoretical physics
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Experimental physics
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Things you can do
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  • Add to Did You Know, and Anniversaries
  • Update the Featured article and Featured picture
  • Add to Physics news
  • Assist with Physics Wikiprojects and Wikibooks
Wikiprojects
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Wikibooks
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Wikibooks logo

These books may be in various stages of development. See also the related Science and Mathematics bookshelves.

Other physics wikibooks may be found at Wikibooks (http://en.wikibooks.org/wiki/Physics)
Categories
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Fundamentals: Physical constants | Physical quantity | Units of measure | Mass | Length | Time | Space | Energy | Matter | Force | Gravity | Electricity | Magnetism | Waves

Basic physics: Mechanics | Electromagnetism | Statistical mechanics/Thermodynamics | Quantum mechanics | Relativity | Optics | Acoustics

Fields: Astrophysics | Atomic physics/Molecular physics/Optical physics | Computational physics | Condensed matter physics | Nuclear physics | Particle physics | Plasma physics | Solid state physics

Tools: Detectors | Interferometry | Measurement | Radiometry | Spectroscopy | Transducers

Background: Physicists | History of physics | Philosophy of physics | Physics education | Physics journals | Physics organizations

Random: General physics topics | Introductory physics | Physics in fiction | Physics lists | Physics software | Physics stubs


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