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The spectral, hemispherical absorptivity of an opaque surface and the spectral distribution of radiation incident on the surface are as shown. Assume that a₁ = 0.8. αλ α 2 4 λ (μη) 9 G₂(W/m².μm) 5000 2 4 6 λ(um) What is the total, hemispherical absorptivity of the surface? α = i If it is assumed that ε = α and that the surface is at 900 K, what is its total, hemispherical emissivity? E = i What is the net radiant heat flux to the surface, in W/m²? gad net i W/m²

The spectral, hemispherical absorptivity of an opaque surface and the spectral distribution of radiation incident on the surface are as shown. Assume that a₁ = 0.8. αλ α 2 4 λ (μη) 9 G₂(W/m².μm) 5000 2 4 6 λ(um) What is the total, hemispherical absorptivity of the surface? α = i If it is assumed that ε = α and that the surface is at 900 K, what is its total, hemispherical emissivity? E = i What is the net radiant heat flux to the surface, in W/m²? gad net i W/m²

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The spectral, hemispherical absorptivity of an opaque surface and the spectral distribution of radiation incident on the surface are as shown. Assume that a₁ = 0.8. xx α 0 0 2 4 6 λ (μm) What is the total, hemispherical absorptivity of the surface? α = i G₂(W/m².μm) 5000 2 4 6 λ (um) If it is assumed that ε = α and that the surface is at 900 K, what is its total, hemispherical emissivity? 8 = i What is the net radiant heat flux to the surface, in W/m²? qad.net = i W/m²
Transcribed Image Text:The spectral, hemispherical absorptivity of an opaque surface and the spectral distribution of radiation incident on the surface are as shown. Assume that a₁ = 0.8. xx α 0 0 2 4 6 λ (μm) What is the total, hemispherical absorptivity of the surface? α = i G₂(W/m².μm) 5000 2 4 6 λ (um) If it is assumed that ε = α and that the surface is at 900 K, what is its total, hemispherical emissivity? 8 = i What is the net radiant heat flux to the surface, in W/m²? qad.net = i W/m²
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