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FM broadcast (VHF) — three-meter waves, line of sight
radio spectrum
88–108 MHz; sealed: the 100 MHz wave is 2.99 m, and its quarter-wave whip is 74 cm — the length of a car antenna, derived: https://narrowhighway.com/s/d6211f4efb2518c6de145decf57f27b131a01c24ce7841853f395b7bc986c323 . VHF barely bends around the Earth, so FM is a line-of-sight service: you hear it to the horizon and little farther. Frequency modulation carries the signal in the wave's TIMING rather than its height, which is why amplitude noise (lightning, ignition) mostly washes out — the static-resistance is structural, not magic.
source
card id
card_n_a7ae37960cae
adjoining cards
- part of → The created order — the science of the floor — a seed of the created order
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