Frequently asked questions about microwaves

• Are microwaves safe

  Yes, microwave ovens are safe when used correctly and according to the manufacturer’s instructions. Microwaves use non-ionising radiation to heat food; they do not make food radioactive. The food absorbs microwave energy, which causes water molecules to vibrate and generate heat. 

  As with any cooking appliance, it’s important to follow the instructions for use, use microwave-safe containers and avoid using a microwave if the door, hinges, seals or latch are damaged

• When was the microwave invented
  The microwave oven was developed after engineer Percy Spencer, working with magnetron technology at Raytheon, noticed that microwaves could heat food. Raytheon’s first commercial microwave oven, the Radarange, was sold in 1947, and Tappan later licensed the technology from Raytheon to develop one of the first microwave ovens designed for home use
• Does microwave kill bacteria

  Yes, microwaves kill bacteria by heating water molecules in them, causing proteins and DNA to denature and cells to rupture. However, for effective sterilisation of food or other items, the entire mass must reach a sufficient temperature for a long enough period, which can be potentially challenging due to uneven heating. To ensure bacteria are killed, you should stir or rotate food, ensure it reaches 74°C, and use a food thermometer. 

• What is a combi microwave

  A combi microwave is a microwave, with a standard turntable, with additional cooking functions, and the ability to combine both heat and microwave function to reduce cooking time.