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# Doppler Effect

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Doppler Effect

by CK-12 //at grade

Students will learn what the Doppler effect is and how to determine frequencies and speeds using the Doppler shift equations.

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## Doppler Shift

by CK-12 //at grade

Explains the Doppler shift for sound.

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• Interactive Simulations

## Doppler Ducks

by CK-12 //at grade

Learn about the Doppler Effect in the context of a duck swimming across a pond.

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• Simulation

## Applet: Doppler Effect

by CK-12 //at grade

A simulation that shows how the Doppler effect works.

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• Video

## Doppler Effect Asymmetry

by CK-12 //at grade

An example is used to explain why the Doppler effect is different depending on if the source of the sound or the observer is moving.

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• Video

## Doppler Effect: Moving Source

by CK-12 //at grade

Explains the Doppler effect, derives the formula for the effect, and solves an example problem. This video looks at the situation where the source is moving.

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• Video

## Doppler Effect: Moving Observer

by CK-12 //at grade

The Doppler effect is explained for a moving observer and the formula for this situation is derived.

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## Doppler Effect Quiz - PPB

by CK-12 //at grade

Calculate the change in frequency of a wave due to a moving source, or the velocity of the source given the new Doppler shifted frequency.

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• Practice
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## Doppler Effect Practice

by CK-12 //at grade
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## Doppler Shift Quiz

by CK-12 //at grade

Reviews the Doppler shift and the calculation of observed frequencies.

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• Critical Thinking

## Doppler Effect Discussion Questions

by CK-12 //at grade

A list of student-submitted discussion questions for Doppler Effect.

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## Doppler Shift

by CK-12 //at grade

This is an activity for students to complete while reading the Doppler Shift Concept

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• Real World Application

## Echolocation

by CK-12 //at grade

Learn how bats fly and hunt in the dark.

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• Real World Application

## Sonic Boom

by CK-12 //at grade

Discover the cause of a sonic boom.

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• Study Guide

## Waves Study Guide

by CK-12 //at grade

This study guide gives an overview of mechanical waves and the characteristics of transverse waves and longitudinal waves. It also looks at wave interaction: interference (constructive and destructive), beat frequency, standing wave, resonance, and the Doppler effect.

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