Electromagnetic waves.

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What are radiowaves used for?
Broadcast TV & Radio Signals. Transmit satelite signals
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What are microwaves used for?
Communication with satelites. Phone signals. Heat up food
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What is Infrared used for?
Monitor temperature. Security Systems. Remote controls. It's given out by all hot objects
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What is Visible Light and give and example of how it's used.
All objects either give off or reflect VL. Cameras use a lens. Lens aperture controls how much light enters.
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What can Ultra Violet be used for?
Detect forged bank notes using fluorescent ink under UV. Fluorescent lamps use UV to emit VL. Security pens
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What are X-Rays used for?
Look inside objects (bone not flesh). Airports scan luggage and people for weapons..
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What can gamma rays be used for?
Radiotherapy. Diagnose and treat cancer. Sterilization.
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Give a disadvantage of microwaves.
Heat human body cells. Phones link to brain tumours
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Give a disadvantage of Infrared.
Heating effect. Cause skin burns.
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Give a disadvantage of Ultra Violet.
Ionising. Sunburns. Cell mutation. Skin cancer. Eye damage.
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Give a disadvantage of Gamma Rays & X-Rays.
Ionising. Penetrate further into body. Cell mutation. Tissues damage and cancer.
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Who discovered Infrared and how?
Herschel. Measuring the temperatures of spectrum created through a spectrum. Infrared was hottest.
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Who discovered Ultra Violet and how?
Ritter, timing how long different colours of spectrum took to turn AgCl strips black. UV was quickest.
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Other cards in this set

Card 2

Front

What are microwaves used for?

Back

Communication with satelites. Phone signals. Heat up food

Card 3

Front

What is Infrared used for?

Back

Preview of the front of card 3

Card 4

Front

What is Visible Light and give and example of how it's used.

Back

Preview of the front of card 4

Card 5

Front

What can Ultra Violet be used for?

Back

Preview of the front of card 5
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