Question G3C02
From subelement G3 - G3C
G3C02
Answer: AWhat is meant by the term “critical frequency” at a given incidence angle?
AThe highest frequency which is refracted back to Earth
BThe lowest frequency which is refracted back to Earth
CThe frequency at which the signal-to-noise ratio approaches unity
DThe frequency at which the signal-to-noise ratio is 6 dB