Linked from

The 121 pages that link to Photon, each with the reason it gives.

• Quantum opticsBroader topic: Individual photons are the basic excitations whose states and statistics quantum optics studies.

• Rydberg formulaRelated: A transition’s energy difference is carried by the emitted or absorbed photon.

• Quantum yieldNarrower topic: Quantum yield uses photons as the units counted in its denominator and often its numerator.

• Charged particleCompared with: Photons carry electromagnetic energy but are not themselves electrically charged.

• Gauge bosonBroader topic: It mediates electromagnetism and is the simplest familiar gauge boson.

• InfraredNarrower topic: Infrared photons carry less energy than visible-light photons because their frequencies are lower.

• Thomson scatteringCompared with: Photon language exposes the quantum recoil neglected in the classical approximation.

• Absorption (electromagnetic radiation)Related: Absorption transfers a photon's energy to matter.

• ChemiluminescenceRelated: Each emitted unit of chemiluminescent light is a photon.

• Corpuscular theory of lightRelated: Photons provide the modern particle concept, but they are not Newton’s material corpuscles.

• Electromagnetic interactionBroader topic: In quantum electrodynamics, photon exchange describes electromagnetic interactions.

• Inverse Compton scatteringNarrower topic: Its initial energy and direction determine the energy transferred during the collision.

• Spontaneous emissionRelated: It carries away the energy released in the transition.

• Wave theory of lightCompared with: Photon behavior complements, rather than replaces, wave descriptions of light.

• Balmer seriesRelated: Each Balmer transition emits or absorbs a photon with a characteristic energy.

• ElectroluminescenceNarrower topic: Each emitted light quantum is a photon.

• Hydrogen spectral seriesNarrower topic: Each emitted line corresponds to a photon whose energy equals the transition's energy difference.

• Invariant massCompared with: A photon has zero individual invariant mass, while a photon system can have nonzero invariant mass.

• Photochemical reactionNarrower topic: Its energy is absorbed to initiate or alter the reaction.

• Quantum efficiencyNarrower topic: Quantum efficiency counts photons rather than measuring optical power alone.

• Sheldon GlashowRelated: Electroweak symmetry leaves the photon as the carrier of the unbroken electromagnetic force.

• Gamma decayNarrower topic: The emitted gamma ray is a photon produced by a nuclear transition.

• Hydrogen spectrumRelated: Each transition emits or absorbs a photon whose energy matches the level difference.

• Electroweak symmetry breakingBroader topic: The unbroken electromagnetic symmetry leaves it massless.

• MicrowaveRelated: Microwave photons have much less energy than visible-light photons and do not ionize atoms.

• Ozone–oxygen cycleRelated: A photon’s energy determines whether it can break an O₂ or O₃ bond.

• PhotodissociationNarrower topic: A photodissociation event begins when a molecule absorbs a photon.

• Photosynthetically active radiationNarrower topic: PAR is often quantified as a flux of photons rather than radiant energy.

• Satyendra Nath BoseRelated: Bose’s statistical derivation counted indistinguishable photons in radiation.

• Solar radiationBroader topic: Solar energy is exchanged with matter in discrete photons.

• Wave opticsCompared with: Photon detections are discrete even when their accumulated pattern follows wave interference.

• Optical spectroscopyRelated: Photon energy determines which transitions a wavelength can excite or probe.

• Rydberg constantRelated: An atomic transition emits or absorbs a photon whose wavelength encodes the predicted wavenumber.

• Einstein coefficientsRelated: Absorption and emission change an atom's state by exchanging photons.

• Inelastic scatteringRelated: Photon scattering can shift photon energy when the target absorbs or supplies energy.

• Electron–positron annihilationRelated: Photons are the most common products of electron–positron annihilation.

• Electroweak theoryBroader topic: It emerges as the massless gauge field after electroweak symmetry breaking.

• Hydrogen-alphaRelated: The transition releases a photon whose energy corresponds to the line’s wavelength.

• Lyman seriesNarrower topic: Each downward transition emits a photon whose energy matches the level difference.

• Photon momentumNarrower topic: Photon momentum is a property of this massless quantum.

• LightRelated: Photoreceptors respond to light by absorbing individual photons.

• Arthur ComptonRelated: Compton explained the scattered X-ray as a photon transferring energy and momentum to an electron.

• Electroweak epochBroader topic: It is the surviving massless gauge boson after electroweak symmetry breaking.

• Energy–momentum relationBroader topic: Its zero rest mass makes energy proportional to momentum: E = pc.

• Z bosonCompared with: Electroweak mixing produces the photon alongside the massive Z boson.

• Photon gasBroader topic: Each member of the gas is a photon, with energy set by its frequency.

• Planck relationRelated: For a photon, the relation gives the energy associated with its frequency.

• Roy J. GlauberRelated: His account treats optical fields as quantum systems whose photon statistics matter.

• Atomic emission spectroscopyRelated: Each atomic transition releases a photon whose energy sets an emission wavelength.

• OptoelectronicsNarrower topic: Photon energy links optical wavelength to electronic transitions in device materials.