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physics

Jul 08

Physics in 16th, 17th and 18th century

16th century

In the 16th century Nicholas Copernicus revived the heliocentric model of the solar system devised by Aristarchus (which survives primarily in a passing mention in the Sand Reckoner of Archimedes). When this model was published at the end of his life, it was with a preface by Osiander that piously represented it as only a mathematical convenience for calculating the positions of planets, and not an account of the true nature of the planetary orbits.

In England William Gilbert (1544-1603) studied magnetism and published a seminal work, De Magnete (1600), in which he thoroughly presented his numerous experimental results.

May 05

Computational physics

Rayleigh-Taylor instability
Rayleigh-Taylor instability

Computational physics is the study and implementation of numerical algorithms in order to solve problems in physics for which a quantitative theory already exists.

Nov 26

Energy

Lightning over Oradea, Romania Lightning is the electric breakdown of air by strong electric fields and is a flow of energy. The electric potential energy in the atmosphere changes into heat, light, and sound which are other forms of energy.

Oct 06

Winners of Nobel Prize in Physics, 2009

This year the Nobel Prize in Physics was awarded to Charles K. Kao "for groundbreaking achievements concerning the transmission of light in fibers for optical communication" and to Willard S. Boyle and George E. Smith "for the invention of an imaging semiconductor circuit – the CCD sensor".

Laser in fibre Laser in fibre

Optical fibers are used in transmitting information by means of pulses of light. The light forms an electromagnetic carrier wave modulated by information.

Charles K. Kao

Jun 24

Atomic, molecular, and optical physics

Helium atom QM

Atomic, molecular, and optical physics is the study of matter-matter and light-matter interactions on the scale of single atoms or structures containing a few atoms. The three areas are grouped together because of their interrelationships, the similarity of methods used, and the commonality of the energy scales that are relevant.

Atomic physics is distinct from nuclear physics, despite their association in the public consciousness. Atomic physics is unconcerned with the nuclear processes studied in nuclear physics, although properties of the nucleus can be important in atomic physics (e.g., hyperfine splitting).

Feb 24

Unsolved problems in physics

Black hole quasar, NASA A "Quasar" Black Hole.

The following is an incomplete list of outstanding problems in physics. Some of these problems are theoretical, meaning that existing theories seem incapable of explaining some observed phenomenon or experimental result. Others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.

Jan 26

Physics in Antiquity

Aristotle

Jan 26

History

History of physics

Dec 15

Methods in physics

Methods in physics

Oct 21

Inauguration of the completion of CERN's Large Hadron Collider

LHC First Beam Day from the CERN Control Centre (CCC)

CERN prepares to celebrate completion of the LHC

Oct 15

Astrophysics

NGC 4414, a typical in the constellation Coma Berenices

Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature, and chemical composition) of celestial objects such as stars, galaxies, and the interstellar medium, as well as their interactions. The study of cosmology is theoretical astrophysics at scales much larger than the size of particular gravitationally-bound objects in the universe.

Oct 07

Nobel Prize in Physics, 2008

Nobel Prize® Medal for Physics The Nobel Prize in Physics in 2008 awarded Yoichiro Nambu, "for the discovery of the mechanism of spontaneous broken symmetry in subatomic physics" and Makoto Kobayashi and Toshihide Maskawa "for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in nature".

Sep 19

CERN: LHC experiments after one week

Integration of the ALICE experiment’s inner tracker

Sep 10

Physics - e-book and free content

A Superconductor

Physics is the science of Nature in the broadest sense. Physicists study the behaviour and interactions of matter and radiation. Theories of physics are generally expressed as mathematical relations.

Sep 08

CERN


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