Microwave oven

Microwave oven is a part of modern kitchen today, it helps to save energy and save time.Beautiful invention has beautiful electronics in it, lets know it 

Microwaves are produced inside the oven by an electron tube called a magnetron. The microwaves are reflected within the metal interior of the oven where they are absorbed by food. Microwaves cause water molecules in food to vibrate, producing heat that cooks the food.

Few interesting facts about microwave 

Microwave oven was found during world war 2 by accident.

microwave energy was used for radar system. Accidentally scientist discovered that microwaves could be used for cooking.while conducting experiments with a new style magnetron, a candy bar in his pocket melted.

The first commercial microwave oven was produced in 1947.The oven was about 6 feet tall and weighed about 750 lbs.

The heart of  the microwave is magnetron, a device which produces radio waves. These waves excite water molecules within food ,causing them to vibrate rapidly. This vibration results in heat, cooking the food from within.

Microwave cooking times are shorter, cooking with a microwave preserve Vitamin C and other nutrients that break down when heated.

Microwave saves energy and saves time.

Microwave Heating principle.

Microwave heating is a multi-physics phenomenon that involves electromagnetic waves and heat transfer ,any material that is exposed to electromagnetic radiation will be heated up.The rapidly varying electric and magnetic fields lead to heating.

Microwave working.

Inside the strong metal box , there is a microwave generator called a magnetron. when we start cooking, the magnetron takes electricity from the power outlet and converts it into high powered  radio waves. Radio waves reaches food compartment through a channel called wave guide.just like light bounces back through wall , microwaves bounces back through wall and penetrate through food and helps in cooking.

MICROWAVE OVEN

A microwave oven consists of 

Transformer to transfer energy to the magnetron

Cavity magnetron which converts high voltage electric energy to microwave radiation

a magnetron control circuit(usually with a microcontroller)

a short wave-guide(to send waves to chamber)

metal cooking chamber

metal wave guide stiring fan

control panel.

READINGS

Commercial frequency used for microwave is 2.45 GHz.