Microwave+Ovens

How Does a Microwave Oven Work?
The typical domestic Microwave oven has a power rating between 600 and 1,500 watts. More watts means more heat, while lower power means longer cooking time. Typical domestic microwave ovens operate at a frequency of 2.45 GHz with an output power of 500W. (7) A microwave oven uses “dielectric heating” to cook food. (1) This is accomplished by using microwave radiation to heat polarized molecules within the food. This excitation is fairly uniform, leading to food being more evenly heated throughout (except in dense objects) than generally occurs in other cooking techniques. (2). In other words, molecules that are electric dipoles, of which water is the most efficient, rotate back and forth; the friction between them creates heat. This process is “dielectric heating.” The literature reveals that microwave heating occurs by two mechanisms, which are dipolar polarization, and ionic conduction ([|Kingston and Jassie, 1998], [|Mingos and Baghurst, 1991] and [|Taylor et al., 2005]). Dipolar polarization is by which heat is produced in polar molecules like water. Dipoles align themselves by rotating with the electric field associated with waves… In conduction, dissolved charged particles (ions) in a sample oscillate back and forth under the influencing electric force of microwaves creating an electric current. This current faces internal resistance because of collisions of charged species with neighboring molecules or atoms, which cause materials to heat up ([|Metaxas, 1996] and [|Ponne, 1996]). The conduction principal has much stronger effect in comparison to dipolar polarization for heat producing capacity ([|Keiko, 2003]).(8)

Upgrade to the microwave oven: http://www.timesofisrael.com/israeli-tech-will-reinvent-the-microwave-says-start-up/