- A graph of the energy radiated from a hot object versus wavelength.
- The curve depends on the temperature of the object; note how the wavelength of maximum intensity shifts as the object's temperature changes.
- The colored bands represent wavelengths of visibile light.
P(T)/P(1000 K) =
Drag/swipe up and down on the graphs to change the temperature of the object.
Planck's Law — The first graph shows the intensity of the blackbody radiation as a function of wavelength (λ) for the selected temperature.
Wien's Law — The peak of the intensity graph occurs at the wavelength λmax as indicated above.
Stefan-Boltzmann Law — In the second graph, the gray curve represents the power radiated as a function of temperature between 850 K and 8500 K. The blue dot represents the power radiated at the selected temperature.