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SESK: Stuff Everyone Should Know · sesk.info/ham-rf-non-ionizing

What type of radiation are radio signals?

Non-ionizing radiation.

  1. Ionizing radiation
  2. Gamma radiation
  3. Non-ionizing radiation ✔

Why: Radio waves do not have enough energy to cause chemical changes in cells or damage DNA. Ionizing radiation, like X-rays and gamma rays, does.

Huh, didn't know that: FCC exposure limits vary with frequency because the body absorbs more RF at some frequencies.

The dad joke
Why did the radio wave stay calm? It was non-ionizing, it does not get charged up.
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Sources

  1. NCVEC 2026-2030 Technician Question Pool (Element 2), errata Feb 19, 2026 https://www.ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf

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Ham RadioWho must make sure no one is exposed to RF energy above FCC limits?Ham RadioWhat hazard comes from touching an antenna while it is transmitting?Ham RadioWhich agency makes and enforces the rules for amateur radio in the United States?

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