An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

(e₁ + e₂)/ e₁ + e₂ - e₁e₂

An infinite parallel planes with emissivities e₁ and e₂, the inte

1.	An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by
A.	(e₁ + e₂)/ e₁ + e₂ - e₁e₂
B.	1/e₁ + 1/e₂
C.	e₁ + e₂
D.	e₁e₂
Answer» B. 1/e₁ + 1/e₂

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An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

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