A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic...

Photon energy is the energy carried by a single photon. The amount of energy is directly proportional to the photon's electromagnetic frequency and thus...

Look up Photon or photon in Wiktionary, the free dictionary. A photon is an elementary particle of light. Photon may also refer to: Photon (comics), two...

wavelengths less than 10 picometers (1×10−11 m), gamma ray photons have the highest photon energy of any form of electromagnetic radiation. Paul Villard...

frequency of the photon, and h is the Planck constant. Thus, higher frequency photons have more energy. For example, a 1020 Hz gamma ray photon has 1019 times...

Photon counting is a technique in which individual photons are counted using a single-photon detector (SPD). A single-photon detector emits a pulse of...

In computer graphics, photon mapping is a two-pass global illumination rendering algorithm developed by Henrik Wann Jensen between 1995 and 2001 that approximately...

The Photons was a punk/new wave band active between 1977 and 1978. They are most notable for their vocalist Steve Strange, who went on to form Visage...

Photon polarization is the quantum mechanical description of the classical polarized sinusoidal plane electromagnetic wave. An individual photon can be...

high frequency photons scattering following an interaction with a charged particle, usually an electron. Specifically, when the photon hits electrons...

A photon sphere or photon circle arises in a neighbourhood of the event horizon of a black hole where gravity is so strong that emitted photons will not...

single-photon source (also known as a single photon emitter) is a light source that emits light as single particles or photons. Single-photon sources...

proton and an antiproton. Pair production often refers specifically to a photon creating an electron–positron pair near a nucleus. As energy must be conserved...

two-photon absorption (TPA or 2PA), also called two-photon excitation or non-linear absorption, is the simultaneous absorption of two photons of identical...

which two photons successively emitted from a calcium atom were shown to be entangled – the first case of entangled visible light. The two photons passed...

A photon rocket is a rocket that uses thrust from the momentum of emitted photons (radiation pressure by emission) for its propulsion. Photon rockets...

Photon antibunching generally refers to a light field with photons more equally spaced than a coherent laser field, a signature being a measured two-time...

dark photon (also hidden, heavy, para-, or secluded photon) is a hypothetical hidden sector particle, proposed as a force carrier similar to the photon of...

The photon structure function, in quantum field theory, describes the quark content of the photon. While the photon is a massless boson, through certain...

Two-photon physics, also called gamma–gamma physics, is a branch of particle physics that describes the interactions between two photons. Normally, beams...

Solar sails (also known as lightsails, light sails, and photon sails) are a method of spacecraft propulsion using radiation pressure exerted by sunlight...

The Hong–Ou–Mandel effect is a two-photon interference effect in quantum optics that was demonstrated in 1987 by three physicists from the University of...

Photon upconversion (UC) is a process in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength than...

Single-photon may refer to: Photon counting devices capable of counting individual photons, for example: Superconducting nanowire single-photon detectors...

high photon energy is able to ionize atoms, causing chemical reactions. Longer-wavelength radiation such as visible light is nonionizing; the photons do...

In particle physics, soft photons are photons having photon energies much smaller than the energies of the particles participating in a particular scattering...

than one photon, then Eve can split off the extra photons and transmit the remaining single photon to Bob. This is the basis of the photon number splitting...

In physics, a photon gas is a gas-like collection of photons, which has many of the same properties of a conventional gas like hydrogen or neon – including...

A single-photon avalanche diode (SPAD), also called Geiger-mode avalanche photodiode (G-APD or GM-APD) is a solid-state photodetector within the same family...

Two-photon excitation microscopy (TPEF or 2PEF) is a fluorescence imaging technique that is particularly well-suited to image scattering living tissue...