Do Now: Doppler Effect

Front

What happens to the pitch of a sound when the source is moving toward an observer?

Back

The pitch sounds higher.

Front

What is the Doppler Effect?

Back

A change in frequency due to the relative motion of a wave source and an observer.

Front

If you are in a moving car and honk the horn, how does the pitch sound to you?

Back

The pitch stays the same because you are moving with the sound.

Front

What frequency would you hear from a fire truck moving away from you if its original frequency is 500 Hz?

Back

You would hear a frequency of 375 Hz.

Front

What types of waves can experience the Doppler Effect?

Back

Any type of wave.

Front

How does the Doppler Effect affect sound waves when the source is moving away from the observer?

Back

The pitch sounds lower.

Front

What is the formula for calculating the observed frequency in the Doppler Effect when the source is moving toward the observer?

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 is the significance of the speed of sound in the Doppler Effect?

Back

The speed of sound is crucial for calculating the observed frequency and understanding how motion affects sound perception.

Front

Can the Doppler Effect be observed with light waves?

Back

Yes, the Doppler Effect can also be observed with light waves, resulting in redshift or blueshift.

Front

What is redshift in the context of the Doppler Effect?

Back

Redshift occurs when a light source moves away from an observer, causing the light to shift toward longer wavelengths.