SC-1404
Radiation
Lower Sec Science · Secondary 2 · Medium · Radiation
A metal kettle is painted dull black on the outside. It is used to boil water on a stove.
Why is a dull black surface better than a shiny surface for heating the kettle by radiation?
Why is a dull black surface better than a shiny surface for heating the kettle by radiation?
- It absorbs more heat radiation than a shiny surface.
- It reflects most of the heat radiation away.
- It conducts heat better than a shiny surface.
- It stops heat from being transferred by convection.
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