Radiation and Matter Flashcards
1
Q
What do all matter’s types and amounts of radiation depend on?
A
Temperature
And temperature depends on the motions of atoms and molecules
temperature ↑ speed ↑
2
Q
What are changes dense objects undergo when they are heated?
A
- Intensity changes - Stefan’s Law
2. Color changes - Wien’s Law
3
Q
What is Wien’s Law?
A
λmax = k/T
where:
λmax = dominant (strongest) wavelength
k = constant
T = temperature
T ↑ λmax ↓
4
Q
What is Stefan’s law?
A
F = σT4
where:
F = Radiation Flux (total energy emitted at all wavelengths per square meter) σ = constant, T = temperature
T ↑ F ↑
