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Gravitational waves are waves of the intensity of gravity that are generated by the accelerated masses of binary stars and other motions of gravitating...

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a...

Charles Hard Townes (July 28, 1915 – January 27, 2015) was an American physicist. Townes worked on the theory and application of the maser, for which he...

Nuclear fuel is material used in nuclear power stations to produce heat to power turbines. Heat is created when nuclear fuel undergoes nuclear fission...

Atomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES) is a spectroanalytical procedure for the quantitative determination of chemical...

Physical causality is a physical relationship between causes and effects. It is considered to be fundamental to all natural sciences and behavioural sciences...

Nanophotonics or nano-optics is the study of the behavior of light on the nanometer scale, and of the interaction of nanometer-scale objects with light...

Criticism of the theory of relativity of Albert Einstein was mainly expressed in the early years after its publication in the early twentieth century,...

In physics, length scale is a particular length or distance determined with the precision of at most a few orders of magnitude. The concept of length scale...

In physics, the concept of absolute rotation—rotation independent of any external reference—is a topic of debate about relativity, cosmology, and the nature...

Eduard Prugovečki (March 19, 1937 – October 13, 2003) was a Canadian physicist and mathematician of Croatian-Romanian descent. Prugovečki was born in Craiova...

In continuum mechanics, objective stress rates are time derivatives of stress that do not depend on the frame of reference. Many constitutive equations...