Quote:
Originally Posted by tknw01
Heat transfer through radiation primarily takes place in absence of a medium whereas convection always needs a medium to take place. I think the correct answer is convection. Fire does not radiate waves of energy as such like the Sun does for instance; instead it heats the air, and hence convects.
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Let's analyze this question in the light of definitions of the two terms.
1. Convection:
heat transfer within the atmosphere involving the upward movement of huge volumes of warm air, leading to subsequent condensation and cloud formation
2. Radiation:
i. the emission of energy in the form of rays or waves
ii. energy emitted from a source in the form of rays or waves, e.g. heat, light, or sound
iii. the feeling of something being radiated, e.g. heat from a hot oven
[Source] Encarta®
I think even the layman would be able to know the answer now. It should of course be
Radiation.