Sound of silence

July 13, 2019 01:05 am

This piece is about radio in general with obvious aviation leanings. The basic thing one has to understand about propagation is that wavelength multiplied by number of times it moves in a second (frequency) gives its velocity. Radio wave’s velocity is derived as 3x108mtr/sec (or 300,000 Km/sec), and this is recognised as “universal constant”. Most people take “SW-FM” as two facets of radio, representing short wave (or HF) and frequency modulation (FM).