Doppler Effect

Front

What is the Doppler Effect?

Back

The observed change in frequency of sound or light because of the relative motion of a wave source and the observer.

Front

When a sound source moves away from an observer, how does the pitch of the sound change?

Back

The pitch appears lower.

Front

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

Back

The frequency increases, resulting in a higher pitch.

Front

If a car's horn sounds higher as it approaches you, what can you infer about its motion?

Back

The car is moving towards you.

Front

What is the relationship between wavelength and frequency in the context of the Doppler Effect?

Back

As frequency increases, wavelength decreases.

Front

If a star's light shifts towards the blue end of the spectrum, what does this indicate about its motion?

Back

The star is moving towards the Earth.

Front

What is redshift in astronomy?

Back

Redshift refers to the phenomenon where light from an object moving away from the observer shifts towards the red end of the spectrum.

Front

What is blueshift in astronomy?

Back

Blueshift refers to the phenomenon where light from an object moving towards the observer shifts towards the blue end of the spectrum.

Front

How does the Doppler Effect apply to sound waves?

Back

It causes a change in pitch perceived by an observer due to the relative motion between the source and the observer.

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.