Technician exam question T0C12

WhyRF radiation differs from ionizing radiation because RF radiation doesn't have sufficient energy to cause chemical changes in cells and damage DNA. RF energy's photons simply don't carry enough energy to knock electrons loose or break the chemical bonds that hold DNA together, the mechanism that makes ionizing radiation dangerous at the cellular level, answer A. RF fields can be detected with ordinary field-strength meters, not only specialized dosimeters (B), RF energy can travel and have effects well beyond a few feet (C), and "perfectly safe" (D) overstates it, RF exposure limits exist precisely because RF energy can still cause harm like tissue heating at high enough levels.