Invention of Microwaves oven. Electromagnetic and Magnetrons

1. Name:Muhammad Kumail
Reg :1346
Name:Moeen ur Rehman
Reg:1347

2. CONTENTS
 INTORDUCTION
 INVENTION
 PRINCIPLE
 APPLICTIONS
 EFFECTS OF MICROWAVE OVEN

3. WHAT ARE MICROWAVES

4. INTRODUCTION
 Microwave oven is a kitchen appliance that heats and
cooks food.
 Microwave oven convert electrical energy into
electromagnetic radiation called microwaves

5. Basic structure

6. INVENTION
 Invented accidentally by Dr. Percy LeBoran Spencer
 Invention of radarange in 1946
 In 1970s,become household items.

7. PRINCIPLE
 Microwave oven uses microwave radiation to heat food
in the subject inside the oven.
 Passing Non-ionizing microwave radiation.
 Frequency 2.45GHz(wave length ~12cm)
 Absorb energy from the microwaves process called
dielectric heating.

8. APPLICATIONS
 Reheating cooked food
 Rapidly heating otherwise slowly prepared cooking
items such as chocolate

9. EFFECTS OF MICROWAVE
 Cancer Causing Effects
 Decrease in Nutritive values
 Biological Effects