Fraunhoffer lines in solar spectrum can be cited as an example of

Fraunhofer lines in a spectrum of radiation are the dark lines within the spectrum. These dark lines or the Fraunhofer lines are the result of selective absorption of the colour of a particular wavelength by the particles present in the path of the radiation.

Stefan’s law: It states that the rate of energy radiated from a body is directly proportional to its emissivity, surface area and the fourth power of the temperature.
Kirchhoff’s law: It states that a hot matter, whether solid, liquid or gas will give a continuous spectrum under high pressures. At low pressures the matter gives an emission line spectrum.
William’s law: It states that in a spectrum of a radiation, one can see dark lines or some missing colours due to the selective absorption of the wavelength by particles in the path of the radiation.
Planck's law: It gives the mathematical relationship on the spectral-energy distribution of a radiation emitted by a body.