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How fast does a radio wave travel through free space?

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  1. At the speed of sound
  2. At 0.86 times the speed of light
  3. At the speed of light

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References

  1. 2026-2030 Technician Class Question Pool, T3B04 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf Checked 2026-10-09.

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