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Doppler Effect in Light and Sound

Doppler Effect in Light and Sound

Assessment

Interactive Video

Physics

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video explains the Doppler effect, starting with sound waves, where the pitch changes as a sound source moves relative to an observer. It then extends the concept to light waves, showing how the spectrum of a star shifts depending on its movement towards or away from us, known as blue-shift and redshift. The video concludes by discussing how these shifts help measure the speed and rotation of stars and detect binary star systems.

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What common experience demonstrates the Doppler Effect?

The change in speed of a moving vehicle

The change in color of a traffic light

The change in pitch of a car horn as it moves past

The change in temperature when a car passes by

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the pitch of a sound change as the source moves towards an observer?

The pitch remains the same

The pitch becomes lower

The pitch fluctuates randomly

The pitch becomes higher

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to sound waves as the source moves away from the observer?

The sound waves disappear

The sound waves become louder

The sound waves are stretched out

The sound waves are compressed

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term used when light from an approaching star shifts to shorter wavelengths?

Greenshifted

Blueshifted

Yellowshifted

Redshifted

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is observed when light from a receding star shifts to longer wavelengths?

The light is blueshifted

The light is yellowshifted

The light is redshifted

The light is greenshifted

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the key to measuring the Doppler Effect in light?

The change in temperature of the star

The change in position of the spectral lines

The change in size of the star

The change in brightness of the light

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following can be determined using the Doppler Effect in astronomy?

The color of a star

The age of a star

The velocity of a star moving towards or away from us

The size of a star

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