Doppler Effect

Front

What is the Doppler Effect?

Back

The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.

Front

True or False: The Doppler effect is observed when a wave-making source moves toward an observer.

Back

True

Front

What does the pitch of a sound wave relate to?

Back

The pitch of a sound wave relates to the wave's frequency.

Front

What happens to the wavelength when the frequency of a wave increases?

Back

The wavelength gets shorter.

Front

What side of the electromagnetic spectrum is most harmful?

Back

The left side is harmful (higher frequency, e.g., gamma rays).

Front

What side of the electromagnetic spectrum is considered harmless?

Back

The right side is harmless (lower frequency, e.g., radio waves).

Front

What does a red shift indicate about an object moving in space?

Back

A red shift indicates that the object is moving away from the observer, decreasing the frequency of the light.

Front

What does a blue shift indicate about an object moving in space?

Back

A blue shift indicates that the object is moving closer to the observer, increasing the frequency of the light.

Front

How does the Doppler Effect apply to sound waves?

Back

When a sound source moves toward an observer, the sound waves compress, resulting in a higher pitch. When it moves away, the waves stretch, resulting in a lower pitch.

Front

What is frequency?

Back

Frequency is the number of waves that pass a point in one second, measured in Hertz (Hz).