Asked by violet
Which material would result in the greatest amount of energy transfer?
An absorber that is dark in color and rough.
A reflector that is dark in color and smooth.
An absorber that is light in color and rough.
A reflector that is light in color and smooth.
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An absorber that is dark in color and rough.
Explanation: dark surfaces absorb more incoming radiation than light ones, and a rough (matte) surface traps and scatters light so less is reflected, increasing absorption. A smooth, reflective surface sends most energy back, so it transfers less. A dark, rough surface is closest to a blackbody (maximum absorptivity/emissivity), so it gives the greatest energy transfer (for radiative heating).
Explanation: dark surfaces absorb more incoming radiation than light ones, and a rough (matte) surface traps and scatters light so less is reflected, increasing absorption. A smooth, reflective surface sends most energy back, so it transfers less. A dark, rough surface is closest to a blackbody (maximum absorptivity/emissivity), so it gives the greatest energy transfer (for radiative heating).
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