Photon

{
  "id": "MLC-T-ENV-020929",
  "term": "Photon",
  "field": "Environment",
  "definition": "1. A discrete “packet” of electromagnetic energy, that has no mass and exhibits properties of both particles and waves. These photon quanta travel at the speed of light. Gamma rays and x-rays are photons.\n\n2. A discrete \"packet\" of pure electromagnetic energy that has no rest mass and travels at the speed of light. Gamma rays and X rays are both photons.",
  "subject": "Air",
  "references": [
    "Radiation Protection Radiation Glossary; RadTown Glossary",
    "Radiation Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/photon/"
}