Lesson 3 Four Laws of Light Flashcards
1
Q
Kirchoff’s Law
A
a surface at steady state temperature will absorb light equally as well as it emits light. Though light is directional, surfaces exchange photons in both directions
2
Q
Planck”s Law
A
This law is generalized to mean that all objects have some internal temperature, and given that temperature, they all glow
3
Q
Wien’s Displacement Law
A
The law implies that the distribution of photons emitted from a surface at any temperature will have the same form or shape as a distribution of photons emitted from a surface at any other temperature
4
Q
Stefan-Boltzmann Law
A
the radiative energy emitted by a surface is proportional to the fourth power of the surface’s absolute temperature
