Lessons â€ē 3 Waves and Optics â€ē 3.1 Wave PhenomenaPrevious lessonNext lesson

3.1.5 Modulation

By the end of this lesson you can:

  • Explain what modulation is and why it is used
  • Distinguish amplitude and frequency modulation
  • Describe how a signal is carried and recovered
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Learn the idea: a short explanation, then a check.

How is information transmitted via an electromagnetic wave. The process is called modulation and in this video I demonstrate two familiar types - amplitude modulation (AM) and frequency modulation (FM)
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Test your predictions in a simulation.
This page from Academo has a great simulation of modulation