Wave-particle duality
Wave–particle duality is the concept that every elementary particle or quantic entity exhibits the properties of not only particles, but also waves. It addresses the inability of the classical concep...
Reality Doesn’t Exist Until We Measure It, Quantum Experiment Confirms
Australian scientists have recreated a famous experiment and confirmed quantum physics's bizarre predictions about the nature of reality, by proving that reality doesn't actually exist until we measur...
Duane Michals’ best photograph: French Vogue does quantum physics
‘I bought the mirror in Bath. It was the perfect way to illustrate Heisenberg’s Uncertainty Principle’
Direct measurements of the wave nature of matter
New experimental techniques map out wave properties only known previously from theory.
Planck's law
Planck's law describes the electromagnetic radiation emitted by a black body in thermal equilibrium at a definite temperature. The law is named after Max Planck, who originally proposed it in 1900. It...
Planck's law - Wikipedia
Photoelectric effect
The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner can be called photoelectrons.According to classical electromag...
Matter wave
All matter can exhibit wave-like behaviour. For example a beam of electrons can be diffracted just like a beam of light or a water wave. Matter waves are a central part of the theory of quantum mechan...
Matter wave - Wikipedia
Duane Michals’ best photograph: French Vogue does quantum physics
‘I bought the mirror in Bath. It was the perfect way to illustrate Heisenberg’s Uncertainty Principle’
Radiative transfer
Radiative transfer is the physical phenomenon of energy transfer in the form of electromagnetic radiation. The propagation of radiation through a medium is affected by absorption, emission, and scatte...
Atomic spectral line
Spectroscopy /spɛkˈtrɒskəpi/ is the study of the interaction between matter and radiated energy. Historically, spectroscopy originated through the study of visible light dispersed according to its wav...
Atomic spectral line - Wikipedia
Bohr-Einstein debates
The Bohr–Einstein debates were a series of public disputes about quantum mechanics between Albert Einstein and Niels Bohr. Their debates are remembered because of their importance to the philosophy of...
Bohr-Einstein debates - Wikipedia
Heisenberg's microscope
Heisenberg's microscope exists only as a thought experiment, one that was proposed by Werner Heisenberg, criticized by his mentor Niels Bohr, and subsequently served as the nucleus of some commonly he...
Heisenberg's microscope - Wikipedia
Hirschman uncertainty
In quantum mechanics, information theory, and Fourier analysis, the entropic uncertainty or Hirschman uncertainty is defined as the sum of the temporal and spectral Shannon entropies. It turns out th...
Uncertainty Principle Derivations
In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with ...
Uncertainty Principle Derivations - Wikipedia
Uncertainty theorems in harmonic analysis
In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with ...
Uncertainty theorems in harmonic analysis - Wikipedia
Many-worlds interpretation
The many-worlds interpretation is an interpretation of quantum mechanics that asserts the objective reality of the universal wavefunction and denies the actuality of wavefunction collapse. Many-worlds...
Popper's experiment
Popper's experiment is an experiment proposed by the philosopher Karl Popper. As early as 1934 he was suspicious of, and was proposing experiments to test, the Copenhagen interpretation, a popular sub...
Popper's experiment - Wikipedia
Introduction to quantum mechanics
Quantum mechanics is the science of the very small: the body of scientific principles that explains the behaviour of matter and its interactions with energy on the scale of atoms and subatomic particl...
Introduction to quantum mechanics - Wikipedia
Gas in a box
In quantum mechanics, the results of the quantum particle in a box can be used to look at the equilibrium situation for a quantum ideal gas in a box which is a box containing a large number of molecul...
Lambert's cosine law
In optics, Lambert's cosine law says that the radiant intensity or luminous intensity observed from an ideal diffusely reflecting surface or ideal diffuse radiator is directly proportional to the cosi...
Kirchhoff's law of thermal radiation
In thermodynamics, Kirchhoff's law of thermal radiation refers to wavelength-specific radiative emission and absorption by a material body in thermodynamic equilibrium, including radiative exchange eq...
Kirchhoff's law of thermal radiation - Wikipedia
Stefan-Boltzmann law
The Stefan–Boltzmann law, also known as Stefan's law, describes the power radiated from a black body in terms of its temperature. Specifically, the Stefan–Boltzmann law states that the total energy r...
Stefan-Boltzmann law - Wikipedia