alleryStart learning →Which color object is the most effective absorber and radiator of heat?
AWhite absorbs and radiates best
BBlack absorbs and radiates best
CBoth are equally effective absorbers
DNeither color affects the rate
Answer & Solution
Correct answer: B. Black absorbs and radiates best
1. The rate of heat transfer by radiation depends mainly on the color of an object's surface.
2. Black is named as the most effective absorber and radiator of energy.
3. White is named as the least effective, the opposite of what the question asks.
4. Saying both colors are equally effective, or that color makes no difference, contradicts the stated color dependence.
5. So black is correct.
_Source: OpenStax Physics (CC BY 4.0), Ch 11 "Thermal Energy, Heat, and Work", section 11.2 Heat, Specific Heat, and Heat Transfer_
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