How do microwave ovens cook food?

A micro wave oven cooks not with the heat but with the radiation similar to radar waves.The heat in an ordinary oven first hits the outside of the food and works its way inward.But microwave radiation goes through the food,bounces off the floor or wall of the oven and goes through the food again.The radiation also changes its polarity or its positive-negative direction several billion times a second.


The rapidly oscillating microwave radiation acts on the water in food because of a special property of water.Water molecule also have polarities one made of oxygen atom,which is negative and two atoms which are positive,each water molecule has positive and negative end.


Every water molecule responds to the reversal of micro wave field by reversing itself,twisting back and forth billions of times a second.As the twisting water molecules rub against other molecules,they generate friction,which causes the food to heat up and cook rapidly.