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Condensed matter physics is the field of physics that deals with the macroscopic physical properties of matter. The most familiar examples of condensed phases are solids and liquids , which arise from the bonding by way of the electromagnetic force between atoms.

Condensed matter physics is the largest field of contemporary physics. Historically, condensed matter physics grew out of solid-state physics , which is now considered one of its main subfields. Astrophysics and astronomy are the application of the theories and methods of physics to the study of stellar structure , stellar evolution , the origin of the Solar System, and related problems of cosmology.

Because astrophysics is a broad subject, astrophysicists typically apply many disciplines of physics, including mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics. The discovery by Karl Jansky in that radio signals were emitted by celestial bodies initiated the science of radio astronomy. Most recently, the frontiers of astronomy have been expanded by space exploration. Perturbations and interference from the earth's atmosphere make space-based observations necessary for infrared , ultraviolet , gamma-ray , and X-ray astronomy.

Physical cosmology is the study of the formation and evolution of the universe on its largest scales. Albert Einstein's theory of relativity plays a central role in all modern cosmological theories. In the early 20th century, Hubble 's discovery that the universe is expanding, as shown by the Hubble diagram , prompted rival explanations known as the steady state universe and the Big Bang. The Big Bang was confirmed by the success of Big Bang nucleosynthesis and the discovery of the cosmic microwave background in The Big Bang model rests on two theoretical pillars: Albert Einstein's general relativity and the cosmological principle.

Numerous possibilities and discoveries are anticipated to emerge from new data from the Fermi Gamma-ray Space Telescope over the upcoming decade and vastly revise or clarify existing models of the universe. IBEX is already yielding new astrophysical discoveries: "No one knows what is creating the ENA energetic neutral atoms ribbon" along the termination shock of the solar wind , "but everyone agrees that it means the textbook picture of the heliosphere —in which the Solar System's enveloping pocket filled with the solar wind's charged particles is plowing through the onrushing 'galactic wind' of the interstellar medium in the shape of a comet—is wrong.

In condensed matter physics, an important unsolved theoretical problem is that of high-temperature superconductivity. In particle physics, the first pieces of experimental evidence for physics beyond the Standard Model have begun to appear. Foremost among these are indications that neutrinos have non-zero mass. These experimental results appear to have solved the long-standing solar neutrino problem , and the physics of massive neutrinos remains an area of active theoretical and experimental research.

The Large Hadron Collider has already found the Higgs boson , but future research aims to prove or disprove the supersymmetry , which extends the Standard Model of particle physics. Research on the nature of the major mysteries of dark matter and dark energy is also currently ongoing. Theoretical attempts to unify quantum mechanics and general relativity into a single theory of quantum gravity , a program ongoing for over half a century, have not yet been decisively resolved. The current leading candidates are M-theory , superstring theory and loop quantum gravity.

Many astronomical and cosmological phenomena have yet to be satisfactorily explained, including the origin of ultra-high-energy cosmic rays , the baryon asymmetry , the accelerating expansion of the universe and the anomalous rotation rates of galaxies. Although much progress has been made in high-energy, quantum , and astronomical physics, many everyday phenomena involving complexity , [91] chaos , [92] or turbulence [93] are still poorly understood. Complex problems that seem like they could be solved by a clever application of dynamics and mechanics remain unsolved; examples include the formation of sandpiles, nodes in trickling water, the shape of water droplets, mechanisms of surface tension catastrophes , and self-sorting in shaken heterogeneous collections.

These complex phenomena have received growing attention since the s for several reasons, including the availability of modern mathematical methods and computers, which enabled complex systems to be modeled in new ways. Complex physics has become part of increasingly interdisciplinary research, as exemplified by the study of turbulence in aerodynamics and the observation of pattern formation in biological systems.

I am an old man now, and when I die and go to heaven there are two matters on which I hope for enlightenment. One is quantum electrodynamics, and the other is the turbulent motion of fluids.

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And about the former I am rather optimistic. From Wikipedia, the free encyclopedia. Study of the fundamental properties of matter and energy. This article is about the field of science.


For other uses, see Physics disambiguation. Not to be confused with Physical science. Main article: History of physics. Main article: History of astronomy.

Leonard Susskind on The World As Hologram

Main article: Natural philosophy. Main article: European science in the Middle Ages. Main article: Physics in the medieval Islamic world. Main article: Classical physics. Main article: Modern physics. See also: History of special relativity and History of quantum mechanics.

Main article: Philosophy of physics.

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Further information: Branches of physics and Outline of physics. Main article: Applied physics. Main articles: Theoretical physics and Experimental physics. Main articles: Particle physics and Nuclear physics. Main article: Atomic, molecular, and optical physics. Main article: Condensed matter physics. Main articles: Astrophysics and Physical cosmology. Further information: List of unsolved problems in physics.

Physics portal. Glossary of physics Index of physics articles Lists of physics equations List of important publications in physics List of physicists Relationship between mathematics and physics Timeline of developments in theoretical physics Timeline of fundamental physics discoveries Earth science Neurophysics Psychophysics Science tourism. However, the term "universe" may also be used in slightly different contextual senses, denoting concepts such as the cosmos or the philosophical world.

For example, the atom of nineteenth-century physics was denigrated by some, including Ernst Mach 's critique of Ludwig Boltzmann 's formulation of statistical mechanics.

Physics - Wikipedia

By the end of World War II, the atom was no longer deemed hypothetical. The same might be said for arXiv. Online Etymology Dictionary.

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Archived from the original on 24 December Retrieved 1 November Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology.

No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.

About Education. Archived from the original on 10 July Retrieved 1 April University of Chicago Press.

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  • Page And as to the first, I greatly doubt that Aristotle ever tested by experiment whether it be true that two stones, one weighing ten times as much as the other, if allowed to fall, at the same instant, from a height of, say, cubits, would so differ in speed that when the heavier had reached the ground, the other would not have fallen more than 10 cubits. The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Archived from the original on 7 April Archived PDF from the original on 24 September Journal of Elasticity. Archived PDF from the original on 18 April Archived from the original on 18 June Retrieved 14 June Archived from the original on 5 September Retrieved 31 July Acoustical Society of America.