# The Doppler Effect

> This section is the Doppler effect for sound. You must state the official definition, explain why pitch rises when a source approaches and falls when it recedes, use f_L=dfracv± v_Lv± v_sf_s with…

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## Full notes

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## More in Doppler Effect

- [Waves: Revision](https://www.hlayiso.com/grade-12/physical-sciences/notes/doppler-effect/waves-revision) — Previous section
- [Applications of the Doppler Effect](https://www.hlayiso.com/grade-12/physical-sciences/notes/doppler-effect/applications-of-the-doppler-effect) — Next section
- [All Doppler Effect sections](https://www.hlayiso.com/grade-12/physical-sciences/notes/doppler-effect)

## Frequently asked questions

### What will I learn in "The Doppler Effect"?

This section covers The Doppler Effect as part of Doppler Effect in Grade 12 Physical Sciences. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "The Doppler Effect", are written against the official CAPS curriculum and ATP for Grade 12 Physical Sciences.

### What should I study after "The Doppler Effect"?

Continue with the next section in Doppler Effect, or test your understanding with the interactive quiz linked to this section.

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