Does cooking food in a microwave oven make it radioactive?
Food cooked in a microwave oven does not present a radiation risk. Microwaves cease to exist as soon as the power to the magnetron of a microwave oven is switched off. They do not remain in the food and are incapable of making either it or the oven radioactive. Source: Microwave Safety, a concise guide and summary. Web site: http://www.microwavecooking.com/Microwave_Safety.