<P> Some current plastic containers and food wraps are specifically designed to resist radiation from microwaves . Products may use the term "microwave safe", may carry a microwave symbol (three lines of waves, one above the other) or simply provide instructions for proper microwave use . Any of these is an indication that a product is suitable for microwaving when used in accordance with the directions provided . </P> <P> All microwaves use a timer for the cooking time, at the end of cooking time, the oven switches itself off . </P> <P> Microwave ovens heat food without getting hot themselves . Taking a pot off a stove, unless it is an induction cooktop, leaves a potentially dangerous heating element or trivet that will stay hot for some time . Likewise, when taking a casserole out of a conventional oven, one's arms are exposed to the very hot walls of the oven . A microwave oven does not pose this problem . </P> <P> Food and cookware taken out of a microwave oven are rarely much hotter than 100 ° C (212 ° F). Cookware used in a microwave oven is often much cooler than the food because the cookware is transparent to microwaves; the microwaves heat the food directly and the cookware is indirectly heated by the food . Food and cookware from a conventional oven, on the other hand, are the same temperature as the rest of the oven; a typical cooking temperature is 180 ° C (356 ° F). That means that conventional stoves and ovens can cause more serious burns . </P>

What is the heating element in a microwave called