Which one of the following is true for black body?

τ = 1, α = ρ = 0
α = 1, ρ = 0, τ = 0
ρ = 1, α = τ = 0
α + τ = 1, ρ = 0

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 2 : α = 1, ρ = 0, τ = 0

Since black body is perfect absorber of radiation hence absorptivity of black body α = 1.

α + τ + ρ = 1 so for black body τ = ρ = 0.

White body: ρ = 1 so τ = α = 0

Transparent body: τ = 1 so α = ρ = 0

Opaque body: τ = 0

4 views Answered 2022-09-04 04:29

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