Basic Qualification · B-006 Feedlines and antenna systems · B-006-008-011
What is the wavelength in free space of a 2 MHz signal?
- A 150 metres
- B 360 metres
- C 1500 metres
- D 30 metres
Correct answer: A — 150 metres. From the official ISED question bank, verified word for word.
Why
A 2 MHz signal has a wavelength of 150 metres because radio waves travel at roughly 300 million metres per second, and dividing this speed by the frequency of 2 million cycles per second gives 150. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.