Radio Waves Flashcards

All 4 cards in this deck

How are radio waves produced?

By oscillations in electrical circuits (an alternating current in an aerial).

What happens in an aerial or electrical circuit when radio waves are absorbed by it?

They induce oscillations (an alternating current) in the circuit, of the same frequency as the waves.

Which group of the electromagnetic spectrum has the longest wavelength and lowest frequency?

Radio waves.

True or false? Radio waves can be made by electrical circuits but cannot themselves affect electrical circuits.

False. Radio waves can both be produced by, and induce, oscillations in electrical circuits.