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

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

Back

The pitch of the sound increases (sounds higher) when the source moves towards the observer.

Front

How does the pitch of a sound change when the source moves away from an observer?

Back

The pitch of the sound decreases (sounds lower) when the source moves away from the observer.

Front

What happens to the frequency of sound waves as the source approaches an observer?

Back

The frequency of sound waves increases as the source approaches the observer.

Front

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

Back

The frequency of sound waves decreases as the source moves away from the observer.

Front

True or False: The Doppler Effect can occur with any type of wave, including sound and light.

Back

True

Front

What is an example of the Doppler Effect in everyday life?

Back

An example is the change in pitch of a siren as an ambulance passes by.

Front

What is the relationship between the speed of the source and the observed frequency in the Doppler Effect?

Back

As the speed of the source increases, the change in observed frequency becomes more pronounced.

Front

What is the formula for calculating the observed frequency in the Doppler Effect?

Back

f' = f (v + vo) / (v + vs), where f' is the observed frequency, f is the source frequency, v is the speed of sound, vo is the speed of the observer, and vs is the speed of the source.

Front

What does a high pitch indicate about the motion of a sound source?

Back

A high pitch indicates that the sound source is moving towards the observer.