Section 1 Flashcards
1
Q
Black body
A
is a thermal radiator/emitter that absorbs perfectly across all wavelengths
2
Q
Stefan-Boltzman law
A
R(T) = σT^4
3
Q
Wien displacement law
A
λ peak = b/T
4
Q
Rayleigh Jeans Model
A
u(v,T) = 8πv^2/c^3 kT
5
Q
the ultraviolet catastrophe
A
Raleigh jeans model does not scale frequency as expected it tends to infinite energy
6
Q
The Planck model
A
u(v,T) = 8πh/c^3 v^3/(e^(hv/kT) -1)
7
Q
Planck formula
A
E = hf
8
Q
CMBR
A
near perfect 2.7K spectrum. the most perfect black body ever measured in nature
9
Q
Classical equipartition comes from
A
computing the expectation value of a Boltzmann distribution
