Untitled

• What is black body radiation?

  Radiation emitted by an object in thermal equilibrium, dependent on its temperature.
• What is the Stefan-Boltzmann law?

  $P =$$\sigma T^4 A$, relating total power emitted to temperature and surface area.
• What is Wien's displacement law?

  $\lambda_{\max} T =$$2.9 \times 10^{-3} \, m \cdot K$, relating peak wavelength to temperature.