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When absorptivity ( ) = 1 reflectivity ( ) = 0...

This question belongs to Mechanical Engineering Heat And Mass Transfer
Heat and Mass Transfer
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When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity (τ) = 0, then the body is said to be a

Answer & Solution
Correct Answer: Option A
A blackbody surface completely absorbs external irradiation, regardless of direction and wavelength distribution. Its surface absorptivity is always 1, so αλ = α = 1. The reflectivity of a blackbody is always zero.
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