Vernier Software and Technology
Vernier Software & Technology

Doppler Effect

Introduction

No doubt you have experienced how the pitch of a car horn or siren changes as it approaches and then passes you. Because study of this effect with sound waves is difficult to visualize, one typically examines the Doppler effect with water waves in a ripple tank. Measurements of frequency and wavelength are easier to make, and changes in the waves due to the motion of the source are easier to observe. In this experiment, you will develop a causal model to account for the change in pitch and an expression relating the shifted frequency to the speed of the object and of the wave in the medium.

Objectives

In this experiment, you will

  • Use video analysis of the waves produced by a stationary source to determine the frequency, wavelength, and velocity of the waves in water.
  • Perform similar analysis to determine the effect of a moving source on these quantities
  • Determine the shifted frequency an observer would detect as the source approaches or recedes.
  • Derive an expression relating the shifted frequency to the speed of the object and of the wave in the medium.

Software for Experiment

This experiment uses Logger Pro software.

Advanced Physics with Vernier — Beyond Mechanics

See other experiments from the lab book.

1Behavior of a Gas
2Heat Engines
3Standing Waves on a String
4Standing Waves in a Column of Air
5Doppler Effect
6Electrostatics
7Coulomb's Law
8Mapping Electric Potential
9Factors Affecting Electrical Resistance
10Series and Parallel Circuits
11Faraday’s Law: Moving Magnet
12Faraday’s Law: Alternating Current
13Capacitors and Inductors
14RLC Circuits
15Curved Mirrors and Images
16Thin Lenses and Real Images
17Thin Lenses and Virtual Images
18Aperture and Depth of Field
19Interference
20Diffraction
21Spectrum of Atomic Hydrogen
22Planck’s Constant

Experiment 5 from Advanced Physics with Vernier — Beyond Mechanics Lab Book

<i>Advanced Physics with Vernier — Beyond Mechanics</i> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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