The compact one is also known as counter-top or portable and is used for reheating the cooked food and for light cooking. Meanwhile, the built-in type is mounted into the cabinetry and is more expensive because it allows you to cook and grill. Most of this kind needs an exhaust fan. Its capacity. Depending on your purpose, choose the appropriate capacity of your microwave. Percy Spencer. He was then working for the Raytheon Corporation on some radar-related research project. He was testing the magnetron when he noticed that the candy bar which was inside his pocket suddenly melted. It was an unusual thing for him and so he conducted another experiment. This time, he put popcorn kernels near the tube and he was very surprised to see the popcorn crack and sputter. The fan circulates the heat inside the oven, resulting to an even distribution of heat to the food. In a conventional oven, the heat is blocked either by the pan or the pot that contains the food. Since the heat just moves in a one-dimensional direction, the parts of the food that are blocked by its container become undercooked. If you need it for preparing the entire meals, a microwave with lots of features and functions such as with one-touch cooking and pre-programmed menus options, is necessary. On the other hand, if it will be used only for reheating, defrosting, or melting foods, a basic microwave will suffice. 600 or 1200 Wattage Options? They are basically concerned with the circumstances that may cause accidents or rather the possibilities that you may get ill should you get overexposed to microwaves. Therefore, awareness is a very important factor. The damages heaped on the oven can be due to a lot of reasons. The significant voltage increase during the design process can actually bring forth damage to the metallic elements. Logically thinking, it may not indeed be impossible that the fears of danger in using microwave appliances have basis especially when you would think of the methods that were basically been doing by the people. The dangerous side effects that can be posed into humans consuming foods that are cooked, heated, or prepared via microwaves can be alarming.