TEST BANK FOR Quantum Physics 3rd Edition By Steph
Maastricht University (UM)
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Exam (elaborations) TEST BANK FOR Quantum Physics 3rd Edition By Steph
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---147februari 20222021/2022A+
- Exam (elaborations) TEST BANK FOR Quantum Physics 3rd Edition By Steph 
The energy contained in a volume dV is 
U(ν,T)dV = U(ν,T)r 
2 
drsinθdθdϕ 
when the geometry is that shown in the figure. The energy from this source that emerges 
through a hole of area dA is 
 dE(ν,T) = U(ν,T)dV dAcosθ 
4πr 2 
The total energy emitted is 
. 
dE(ν,T) = dr dθ dϕU(ν,T)sinθ cosθ 
dA 
0 4π 
2π 
∫ 0 
π /2 ∫ 0 
cΔt 
∫ 
= dA 
4π 
2πcΔtU(ν,T) dθ sinθ cosθ 
0 
π / 2 ∫ 
= 1 
4...
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