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Physics HL

Chapter 16: The Doppler Effect

Build full Doppler-effect fluency from wavefront geometry and low-speed light shifts to sound formulas for moving sources, moving observers, and reflected-wave measurements.

Estimated chapter time: 180 minutes

Chapter Topics

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  1. 1How to Read This Doppler Effect Chapter
    1. 1.1Why This Chapter Matters
    2. 1.2Learning Targets
    3. 1.3How to Work This Chapter Efficiently
  2. 216.1 The Doppler Effect at Low Speeds
    1. 2.1Stationary Source, Moving Observer
    2. 2.2Moving Source, Stationary Observer
    3. 2.3Frequency Shift Is Not Loudness Change
  3. 316.2 The Doppler Effect for Light and Red-Shift
    1. 3.1Approximate Light-Shift Relations for Small Speeds
    2. 3.2Blue-Shift and Red-Shift Language
    3. 3.3Astrophysical Use and Validity Limits
  4. 416.3 The Doppler Effect for Sound: Moving Source
    1. 4.1Deriving Frequency for a Moving Source
    2. 4.2Wavelength Shift and Wave Speed Invariance
    3. 4.3Sign Selection Workflow Under Time Pressure
  5. 516.4 Moving Observer, Combined Motion, and Reflections
    1. 5.1Stationary Source with Moving Observer
    2. 5.2General Combined-Motion Form
    3. 5.3Reflected Sound and Double Shift
  6. 6Chapter 16 Wrap-Up
    1. 6.1Exam Workflow for Doppler Problems

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