DU0-001 · Question #82
Which method transfers heat by electromagnetic waves?
The correct answer is A. Radiation. Radiation transfers heat through electromagnetic waves and requires no medium - it can travel through the vacuum of space, which is how the Sun's energy reaches Earth. Convection transfers heat through the movement of fluids (liquids or gases), such as warm air rising in a…
Question
Options
- ARadiation
- BConvection
- CConduction
- DEvaporation
How the community answered
(26 responses)- A81% (21)
- B4% (1)
- C4% (1)
- D12% (3)
Explanation
Radiation transfers heat through electromagnetic waves and requires no medium - it can travel through the vacuum of space, which is how the Sun's energy reaches Earth. Convection transfers heat through the movement of fluids (liquids or gases), such as warm air rising in a room. Conduction transfers heat through direct physical contact between objects, like a metal spoon heating up in hot soup. Evaporation is a phase change process (liquid to gas) that involves heat absorption, but it is not classified as a method of heat transfer in the same category.
Memory tip: Radiation rhymes with "waves" - think of radio waves and sunlight, both electromagnetic, both traveling without needing anything to pass through.
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