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

What does the Doppler Effect cause a shift in?

Back

Pitch, wavelength, and frequency.

Front

How does the frequency of sound change when the source moves away from the observer?

Back

The frequency decreases.

Front

What happens to the pitch of a sound when the frequency is lower?

Back

The pitch also lowers.

Front

What is the relationship between wave speed, frequency, and wavelength?

Back

Wave speed = frequency x wavelength.

Front

What type of sound waves are associated with high pitch?

Back

Short sound waves.

Front

What happens to the observed frequency when the observer moves towards a stationary sound source?

Back

The observed frequency increases.

Front

What is the effect on frequency when both the observer and the source move towards each other?

Back

The observed frequency is maximized.

Front

What is the formula for calculating the observed frequency when the source is moving?

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 happens to the wavelength of sound as the source moves away from the observer?

Back

The wavelength increases.