Microwave ovens cook food using microwave energy that issimilar to naturally occurring radio waves. Normally, these"waves" would fade as they disappeared into the atmospherebut in a microwave oven they are concentrated onto foodcausing it to heat up.Microwave energy can not pass through metal – so it can notescape from inside your microwave oven – but it can passthrough materials like glass, porcelain, plastic and paper.These are the things used to makemicrowave-safe cookingequipment.Microwave-safe cooking equipment will still get hot as thefood it contains heats up.Checking your cooking utensilsMost heat-resistant, non-metallic cooking utensils are safe to use in yourmicrowave. If you are not sure you can use a utensil in your microwave,follow this simple test:3 Turn the microwave oven on for 30 seconds only.4 At the end of the time, carefully check to see if the water haswarmed up. If the water has not warmed up but the utensil has, theutensil is not microwave-safe and should not be used in the oven.The microwave energy focuses on the moisture in thefood causing lots of tiny vibrations. The vibrations get sogreat that the moisture – and the food – heat up.7SafetyNever use scratched,cracked or damagedglass in a microwave.Damaged glass canexplode.SafetyNever use equipmentmade of metal, exceptfoil in your microwaveoven.The microwave energycan not pass through themetal so it bounces offand sparks against theinside of the oven.Stop the microwave straightaway if any equipment doescause sparks.Remember that some crockeryhas a metal trim around theedge. Even this trim can causesparks.Introducing microwavecooking1 Make sure that the grill is positioned in the upwards position tothe top of the microwave (Do not use your hands to touch the grillas it may already be hot).2 Put the utensil into the oven next to a cup of water – use a cupthat you know is microwave-safe. Close the door