The outside of one of two identical shiny metal containers is painted dull black. The containers are filled with equal masses of hot water at the same temperature.
Why does the dull black container cool more quickly?
1 )
Black surfaces are better conductors than shiny surfaces.
Black surfaces are better emitters of radiation than shiny surfaces.
3 )
Black surfaces are better reflectors of radiation than shiny surfaces.
4 )
Black surfaces are worse absorbers of radiation than shiny surfaces.
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