When you sit by campfire, how does it hot air heat you
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Answer:
The themal radiation from the fire spread out in all direction and is abel to reach you
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Explanation:
- By conduction, which is heat traveling in connected material. For example. when you grill a fish on a campfire, the far end of the stick you hold to skewer the fish is also getting hot. This is why you use wood and not metal.
- By convection, which is heat that warms the air and then the air travels to you and heats you. This method is used by modern oven technology. However, unless there is a cross draft sideways, the hot air usually won't reach you as hot air travels upward.
- By radiation, heat travels to you at light speed as radiation is emitted by the heat source and radiation does not require a medium to propagate. This is the same mechanism as when heat travels from the Sun to the Earth.
So now you know when you are sitting near a bonfire, most of the heat you experience will be from fire radiation. This kind of radiation is safe, as long as you use common sense to maintain yourself a good distance from the source of the radiation.
Hot air will also occasionally blow to you by convection when the wind changes direction.
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