- Madison, Georgia (Wikipedia)
Madison is a city in Morgan County, Georgia, United States. It is part of the Atlanta-Athens-Clarke-Sandy Springs combined statistical area. The population was 4,447 at the 2020 census, up from 3,979 in 2010. The city is the county seat of Morgan County and the site of the Morgan County Courthouse.
- Photon (Wikipedia)
A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) ’light’) is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless particles that always move at the speed of light when in vacuum. The photon belongs to the class of boson particles.