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...

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

where E is the energy per photon, f is the frequency of the photon, and h is the Planck constant. A single gamma ray photon, for example, might carry...

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...

A photon sphere or photon circle is an area or region of space where gravity is so strong that photons are forced to travel in orbits, which is also sometimes...

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

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

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

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...

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...

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...

Photon antibunching generally refers to a light field with photons more equally spaced than a coherent laser field, a signature being signals at appropriate...

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

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...

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...

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

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

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...

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

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

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

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...

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 Media is a news website reporting on Hong Kong news abroad. Founded in April 2023 by former Hong Kong journalists including Shirley Leung from Apple...

universe contains a variety of weapons, ranging from missiles (the classic photon torpedo) to melee (primarily used by the Klingons, a race of aliens in the...

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

corresponds more or less with the range of light visible to the human eye. Photons at shorter wavelengths tend to be so energetic that they can be damaging...