Physics-The electromagnetic spectrum

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What is the order of the electromagnetic spectrum?
Radio Waves,Micro Waves,Infrared,Visible light,Ultra-violet,x-rays,gamma
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What waves do radio waves have?
long waves
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What does each successive region have in terms of waves?
a shorter wavelength ending with gamma rays,which have the shortest waves
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What is the frequency of radio waves?
low frequency
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what does each successive region have in terms of frequency?
a higher frequency ending with gamma rays,which have the highest frequency
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What speed do all electromagnetic waves travel at?
the same, which is in a vacuum
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Name the uses of microwaves
sky satellite transmission,mobile phone signals,microwave ovens
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Name the uses of infra red
remote control systems,thermal imaging
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Name the uses of visible light
seeing, communication
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What do ultra-violet,x-rays and gamma rays all have in common?
they are all ionising radiations that can cause cancers if we are over exposed
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How does the total internal reflection occur?
when light strikes a surface at a angle greater than its critical angle. This allows optical fibres to carry information over large distances
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why may there be health risks from the over exposure to microwaves?
due to mobile phones or tetra masts
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Where are geosynchronous satellites?
they stay above the same point on the earths surface.
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what does geosynchronous satellites being above the same point on the earths surface allow?
intercontinental communication by using microwaves that pass easily through the earths atmosphere
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where is infrared radiation used?
in intercontinental optical fibre links
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Other cards in this set

Card 2

Front

What waves do radio waves have?

Back

long waves

Card 3

Front

What does each successive region have in terms of waves?

Back

Preview of the front of card 3

Card 4

Front

What is the frequency of radio waves?

Back

Preview of the front of card 4

Card 5

Front

what does each successive region have in terms of frequency?

Back

Preview of the front of card 5
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