Quote:
Originally Posted by DEADLYDOCTOR
@silent volcano
radiation travels easily through air.
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firstly radiations travel through empty space, yeah you are right air does not stop traveling radiations. Okay lets do an experiment.
Point A (A highSpeed fan)........Point B (sitting person)................point C( Source of heat).
now if fan blows the air at about speed of 200 Km per hour or more. The person will feel almost no heat.
Why? We know the moving air does not stop heat transfer while in this case it has almost stopped.
How? because the transfer of heat was through a medium, gas molecules which are not not coming from the direction of source of heat.
So what was the medium for transfer of heat? Had it been radiation, not even 600 km/hour blown air not been able to stop this transfer. because radiation is independent of movement of air. while convection needs movement of air molecules.
So the main transfer of heat was by air and not radiation.