Radiowaves

This lesson covers:

  1. How radio waves are generated, transmitted, and received
  2. The different types of radio waves, and how they're used

True or false? Radio waves are electromagnetic waves with the longest wavelength and the lowest frequency

True

False

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Radio waves can be created using a:

Direct current

Alternating current

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Illustration of an oscilloscope displaying a waveform.

Oscilloscopes are used to:

Receive radio waves

Display the wave frequency of an alternating current

Transmit radio waves

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The three types of radio waves are:

Long waves

Mid-range waves

Short waves

Very short waves

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Illustration showing radio waves diffracting around the curved surface of the earth.

Which of the following types of radio waves can travel long distances and diffract (bend) around the curved surface of the earth?

Long waves

Short waves

Very short waves

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Diagram showing radiowave transmission between two devices with points A and B.

In the above image, what are A and B? 

A is a generator, B is a transformer 

A is a transmitter, B is a transformer 

A is a transmitter, B is a receiver 

A is a receiver, B is a generator 

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