The energy of a photon is directly proportional to its frequency, as described by the equation E = hf, where h is Planck's constant and f is the frequency of the photon.

The momentum of a photon is related to its energy and the speed of light, as given by the equation p = hf/c, where h is Planck's constant, f is the frequency of the photon, and c is the speed of light.

The wavelength of a photon is inversely proportional to its energy, as described by the equation λ = hc/E, where h is Planck's constant, c is the speed of light, and E is the energy of the photon.

The polarization of a photon refers to the direction of its electric field oscillations.

The photoelectric effect is the phenomenon where a photon interacts with an electron in a material, causing the electron to be ejected from the material.

Compton scattering is the process where a photon interacts with an electron, causing the electron to recoil and the photon to change its wavelength.

Pair production is the process where two photons interact to produce an electron and a positron.

Bremsstrahlung is the process where a charged particle is accelerated, emitting photons.

Refraction is the phenomenon where light interacts with matter, causing it to change direction.

Reflection is the phenomenon where light interacts with matter, causing it to bounce back.

Diffraction is the phenomenon where light interacts with matter, causing it to spread out.

Polarization is the phenomenon where light interacts with matter, causing its polarization to change.

A solar cell is a device that converts light into electricity.

A light-emitting diode is a device that converts electricity into light.

An optical amplifier is a device that amplifies light.