594836
Description
Flashcards by Bradley Sansom, updated more than 1 year ago
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Created by Bradley Sansom
about 10 years ago
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| Question | Answer |
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Image:
digital (image/jpg)
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Digital signals consist of 2 states: On (1) and Off (2). |
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Image:
analogue.gif (image/gif)
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Analogue signals can vary in frequency and amplitude. Analogue signals are used in FM (Frequency Modulated) and AM (Amplitude Modulated) radio. |
| What are optical fibres? | Optical fibres are thin rods of glass. Light going in from one end goes under repeated total internal reflection and emerges the other end. Information such as computer data and telephone calls can be converted into eletrical signals. |
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