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Card 36
Front
What are radio waves used for?
Back
Card 37
Front
Why are radio waves and microwaves good at transmitting information over long distances?
Back
Card 38
Front
Why are microwaves used for satellite communication?
Back
Card 39
Front
What radiation is used in optical fibres?
Back
Card 40
Front
How do optical fibres work?
Back
Card 41
Front
What values can an analogue signal take?
Back
Card 42
Front
What values can a digital signal take?
Back
Card 43
Front
How are the pulses in a digital signal created?
Back
Card 44
Front
Why do signals have to be amplified?
Back
Card 45
Front
Why is noise less of a problem with digital signals than analogue?
Back
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