1. Microwaves By: Marie Schmid, Jenny Reybrock, Kyle Williams

2. Table of Contents What is a microwave? Characteristics What can it go through? Discovery Past, present, and future uses Dangers (microwave sickness)

3. What is a microwave? Short, high frequency wave of electromagnetic energy. Short radio wave

4. Characteristics Wave Length – between one and three hundred millimeters. (.25” – 12”) Frequency –Between 300 MHz and 300 GHz Invisible

5. What can it go through? Glass Paper Plastic Most ceramics Rain Smoke Fog Ionosphere

6. Discovery Who found it? –Harry Boot –John Randall Found it how? - On accident - Looking for submarines How was it found to help cook food? - Dr. Spencer

7. Past Uses Used in World War Two Radio Contacting Finding Submarines

8. Present Uses Microwave oven (to heat food) Satellites Space communications Navigations Car phones Radar Drying materials Medicine for diathermy treatment

9. Future Uses Satellite dishes Cell-phone towers What we use today

10. Microwave Sickness First Signs –Low blood pressure –Slow pulse Later Signs -sympathetic nervous system (stress) -High blood pressure Increased risk of caner

11. Microwave Sickness Symptoms –Headache –Dizziness –Eye pain –Sleeplessness –Stomach pain –Nervous tension –Hair Loss

12. MORE DANGER! Microwaves leaking from an oven can be hazardous to people. Harmful to pregnant women, because of the radiation leakage.

13. Sources Smgaels.org Google Images World Book Encyclopedia The Glencoe Book