{
  "id": "stefan-boltzmann-constant",
  "name": "Stefan-Boltzmann constant",
  "symbol": "sigma",
  "value": 5.670374419e-08,
  "unit": "W m^-2 K^-4",
  "category": "Thermodynamic",
  "url": "https://gratisapi.com/api/physical-constants/stefan-boltzmann-constant"
}