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3D E2EdE2
z.ir eBEE2dEQ BE
FRB
Tdnz NKBT
Inz
P
ZNhz
V2
N.f
NKBT Na
7
from2
yfyt9mgh
mvzhng3DE
PCDGds VEdE
ez fe DGdsx.BE xconstant
lnZNhzconstant
tNlnv
3NtnBF
KBT.tn
Zfree
energy
P1
⼗⼆
KBT
P
VNKBT
U
3N
3NKBT 3KBT
in eqiii
Macroscopicstate evolvestoincrease
the
number
of microscopicstate
GIng Sik
Bing Sklnw
We
want
heat
flows
from
high
temperaturetolow
temperature
Ch4 ThermalradiationandPlanckDistribution
4.1PlanckDistribution photons
EMeǖÉÉ
radiationpower
energyquantized EatWEw
Assumption EnsE0Eo no 3E
1
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Zwéw p
Plank Ééntw Éxn xt1converge
of1x x 3x4
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