Photons are the fundamental particles of light. They are bundles of electromagnetic energy that travel at the speed of light and have no mass.
Photons are produced by the movement of charged particles, such as electrons, within atoms. When these particles change energy levels, they emit photons.
Photons make up the electromagnetic spectrum, which includes all forms of electromagnetic radiation, from radio waves to gamma rays. Each type of photon has a specific energy and wavelength, which determines its place on the spectrum.
Yes, photons can be detected using specialized equipment such as photodiodes or photomultiplier tubes. These devices can convert the energy from photons into an electric current, which can then be measured.
Photons have a wide range of practical applications, including in telecommunications, solar panels, and medical imaging. They are also used in everyday devices such as remote controls and digital cameras.