Question
What are the two components of a radio wave?
Answer Options
- A) Impedance and reactance
- B) Voltage and current
- C) Electric and magnetic fields
- D) Ionizing and non-ionizing radiation
Correct Answer: C
Explanation
As discussed in T3B01, a radio wave is fundamentally an electromagnetic wave. This means it is composed of two continuously interacting fields: a measurable Electric field and a measurable Magnetic field. They are inseparable and perpendicular to each other.
These two fields propagate together and sustain each other through space. Without both the electric and magnetic components, the energy would not propagate as a radio wave.
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