Quantum Mechanics





Space technology

Science

Quantum Mechanics

The latest articles related to Quantum Mechanics

Nuclear astrophysics – History

The basic principles of explaining the origin of the elements and the energy generation in stars were laid down in the theory of nucleosynthesis which came together in the late 1950s from the seminal works of Burbidge, Burbidge, Fowler, and Hoyle in a famous paper and independently by Cameron. Fowler is largely credited with initiating [...]

Omniverse – Introduction

Physical Cosmology

Omniverse is the conceptual ensemble of all possible universes, with all possible laws of physics. In this physical cosmology context, the limitation of the definition of “universe” that it has only one set of “physical laws and constants that govern them,” is expanded to include multiple sets of physical laws and constants, each expressed as [...]

R-process – History

Stellar Nucleosynthesis

The r-process was seen to be needed from the relative abundances of isotopes of heavy elements and from a newly published table of abundances by Hans Suess and Harold Urey in 1956. Among other things, this data showed abundance peaks for germanium, xenon, and platinum. According to quantum mechanics and the nuclear shell model, radioactive [...]

Physical body – In classical physics, mechanics, quantum physics, and cosmology

A physical body is an object which can be described by the theories of classical mechanics, or quantum mechanics, and experimented upon with physical instruments. This includes the determination of trajectory of position through space, and in some cases of in space, over a duration of time, as well as means to change these, by [...]

Astrophysics – Introduction

Astrophysics (Greek: ”Astro ”- meaning “star”, and Greek: ”physis ”– ”φύσις ” – meaning “nature”) 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 galaxies, stars, planets, exoplanets, and the interstellar medium, as well as their [...]

Stellar evolution – Stellar remnants

After a star has burned out its fuel supply, its remnants can take one of three forms, depending on the mass during its lifetime. White dwarfs For a star of 1 solar mass, the resulting white dwarf is of about 0.6 solar mass, compressed into approximately the volume of the Earth. White dwarfs are stable [...]

Mechanics – Classical versus quantum

The major division of the mechanics discipline separates classical mechanics from quantum mechanics. Historically, classical mechanics came first, while quantum mechanics is a comparatively recent invention. Classical mechanics originated with Isaac Newton’s Laws of motion in Principia Mathematica, while quantum mechanics didn’t appear until 1900. Both are commonly held to constitute the most certain knowledge [...]

Electromagnetism – The photoelectric effect

In another paper published in that same year, Albert Einstein undermined the very foundations of classical electromagnetism. His theory of the photoelectric effect (for which he won the Nobel prize for physics) posited that light could exist in discrete particle-like quantities, which later came to be known as photons. Einstein’s theory of the photoelectric effect [...]

Natural science – Branches of natural science

Astronomy This discipline is the science of celestial objects and phenomena that originate outside the Earth’s atmosphere. It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe. Astronomy includes the examination, study and modeling of stars, planets, comets, galaxies and the [...]

Mechanics – Sub-disciplines in mechanics

The following are two lists of various subjects that are studied in mechanics. Note that there is also the “theory of fields” which constitutes a separate discipline in physics, formally treated as distinct from mechanics, whether classical fields or quantum fields. But in actual practice, subjects belonging to mechanics and fields are closely interwoven. Thus, [...]

Stellar nucleosynthesis – History

In 1920, Arthur Eddington, on the basis of the precise measurements of atoms by F.W. Aston, was the first to suggest that stars obtained their energy from nuclear fusion of hydrogen to form helium. In 1928, George Gamow derived what is now called the Gamow factor, a quantum-mechanical formula that gave the probability of bringing [...]

Nuclear physics – Modern nuclear physics

A heavy nucleus can contain hundreds of nucleons which means that with some approximation it can be treated as a classical system, rather than a quantum-mechanical one. In the resulting liquid-drop model, the nucleus has an energy which arises partly from surface tension and partly from electrical repulsion of the protons. The liquid-drop model is [...]









Go To Top »