Question #858Radio Theory and Communication Principles
Approximate wavelength of a 7 MHz signal is
- 10 metres
- 80 metres
- 20 metres
- 40 metres ✓ Correct answer
Explanation: Wavelength λ (metres) ≈ 300 / frequency (MHz). 300/7 ≈ 42.9 m → 40 m band.
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