Which of the following will radiate heat to large extent? (a) Rough surface (b) Polished surface (c) Black rough surface (d) Black polished surface
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(c) Black rough surface will radiate heat to large extent.
Why will black rough surface radiate heat to large extent?
- Scientific observations have proved that maximum radiation is absorbed by black surfaces. As a result, maximum heat will also be radiated by a black surface.
- For a shiny substance, heat absorbed will be less as maximum heat gets reflected back from a shiny object.
- Hence, a black rough surface will absorb and radiate most heat.
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Explanation:
(c) Black rough surface is the right answer
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