Question
What type of radiation are radio signals?
Answer Options
- A) Gamma radiation
- B) Ionizing radiation
- C) Alpha radiation
- D) Non-ionizing radiation
Correct Answer: D
Explanation
Radio waves are a form of electromagnetic energy, just like visible light, but with a much lower frequency and energy. They are classified as non-ionizing radiation. This means the photons in radio waves do not have enough energy to break chemical bonds within the body or damage DNA.
Ionizing radiation (like X-rays or Gamma rays) has this harmful ability. Since radio signals are non-ionizing, the main health concern is heating of tissue, which the FCC regulates through strict limits on maximum permissible exposure (MPE) for amateur operators.
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