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More cards in this set
Card 16
Front
Which three types of signals are carried by radio waves?
Back
Card 17
Front
What is a Bluetooth signal?
Back
Card 18
Front
Why was Bluetooth set up?
Back
Card 19
Front
What type of waves do we use to carry satellite TV signals?
Back
Card 20
Front
What is the main use of radio waves with a very long wavelength?
Back
Card 21
Front
Why are they used for this purpose?
Back
Card 22
Front
What possible hazards are there when using mobile phones?
Back
Card 23
Front
Why does the UK government recommend that the use of mobile phones by children should be limited?
Back
Card 24
Front
What kind of radiation is used to transmit signals through an optical fibre?
Back
Card 25
Front
Why doesn’t the radiation travelling through an optical cable escape from the sides?
Back
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