If heat travels upward, how can an overhead broiling element cook foods with such intense heat?
Although some conduction and convection cooking occurs within the broiler, it's mainly radiant heat that cooks the food. This heat emanates from the broiling element and, to a lesser extent, from the metal walls, which have absorbed some of the heat. While convection heat by nature rises, radiant heat travels in any direction. It moves in a straight line until it is absorbed by an object or is reflected. In the latter case, it begins another linear journey, this time prescribed by the laws of angular reflection.
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12:18:24 on 07/30/07
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