For an opaque surface, the absorptivity (α) , transitivity (τ) and r – McqOptions

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1.	For an opaque surface, the absorptivity (α) , transitivity (τ) and reflectivity (ρ) are related by the equation
A.	α + ρ = τ
B.	ρ + α + τ = 0
C.	α + ρ = 1
D.	α + ρ = 0
Answer» D. α + ρ = 0

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