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ZingPath: Wave Properties

Doppler Effect

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Wave Properties

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Lesson Focus

Doppler Effect


Learning Made Easy

You get to learn about the basic properties of waves. Check out a few of the factors that affect the speed of waves, and learn about the Doppler effect and the useful property of resonance.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Explain why the Doppler effect occurs.
  • Give examples of applying this effect in daily life.

Everything You'll Have Covered

What is sound?

~ Sound is a mechanical wave with frequency and wavelength that can travel through the air by means of the vibration of air molecules.

What happens to the wavelength and frequency of sound waves when the source of the sound is at rest?

~ When the source of sound is at rest, the wavelength and frequency of the sound waves being produced will be constant.

What is the Doppler Effect?

~ The Doppler Effect is the change in the frequency of a wave as the result of relative motion between the wave source and the observer detecting the wave.

What happens when the source of a sound begins to move closer to the person hearing the sound?

~ As a sound source begins to move closer to the person hearing the sound, the frequency of the sound waves received by the listener increase as the source produces new sound waves while moving toward the previously produced waves.

Tutorial Details

Approximate Time 2 Minutes
Pre-requisite Concepts Students should be able to define frequency, sound, and waves.
Course Physics
Type of Tutorial Animation
Key Vocabulary frequency, sound, waves