Microwaves

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Microwaves
By Marie Schmid, Jenny Reybrock, Kyle Williams
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Table of Contents

• What is a microwave?
• Characteristics
• What can it go through?
• Discovery
• Past, present, and future uses
• Dangers (microwave sickness)

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What is a microwave?

• Short, high frequency wave of electromagnetic
  energy.
• Short radio wave

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Characteristics

• Wave Length
• between one and three hundred millimeters. (.25
  12)

• Frequency
• Between 300 MHz and 300 GHz

• Invisible

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What can it go through?

• Glass
• Paper
• Plastic
• Most ceramics
• Rain
• Smoke
• Fog
• Ionosphere

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Discovery

• Who found it?
• Harry Boot
• John Randall

• How was it found to help cook food?
• - Dr. Spencer

• Found it how?
• On accident
• Looking for submarines

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Past Uses

• Used in World War Two
• Radio Contacting
• Finding Submarines

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Present Uses

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

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Future Uses

• Satellite dishes
• Cell-phone towers
• What we use today

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Microwave Sickness

• First Signs
• Low blood pressure
• Slow pulse

• Later Signs
• sympathetic nervous system (stress)
• High blood pressure

• Increased risk of caner

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Microwave Sickness

• Symptoms
• Headache
• Dizziness
• Eye pain
• Sleeplessness
• Stomach pain
• Nervous tension
• Hair Loss

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MORE DANGER!

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

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Sources

• Smgaels.org
• Google Images
• World Book Encyclopedia
• The Glencoe Book