September 19, 2013

FCC Technician Exam Question Of The Day (T0C01)

Q) What type of radiation are VHF and UHF radio signals?

A) Non-ionizing radiation

NJ2X Notes:
Non-ionizing radiation refers to any type of electromagnetic radiation that does not carry enough energy to ionize atoms or molecules.  Non-ionizing radiation with sufficient power can cause heating in living tissue.  VHF and UHF radio signals are non-ionizing radiation.

Non-ionizing Radiation Warning Sign
Ionization removes an electron from an atom or molecule.  Ionizing radiation is dangerous since it damages DNA.  Examples of ionizing radiation include X-rays and gamma rays.

Ionizing Radiation Warning Sign