November 2000
Intermediate to advanced
336 pages
7h 43m
English
Content preview from Radio and Electronics Cookbook
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11
Waves – Part 2
Getting weaker
Imagine a torch battery connected to a bulb by wires about 1 metre long. The bulb lights normally. If we now take the bulb 100 metres away from the battery and wire it up, we would expect the bulb to be somewhat dimmer, which is exactly what would happen. It happens because of the resistance of the wires – the wires do not form a perfect conductor. A similar situation occurs with radio waves.
All waves suffer from
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