Doppler Effect Review

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 happens to the pitch of a sound when the source moves towards an observer?

Back

The pitch increases (higher pitch).

Front

What happens to the pitch of a sound when the source moves away from an observer?

Back

The pitch decreases (lower pitch).

Front

What is a Blue Shift?

Back

A Blue Shift occurs when a light source moves towards an observer, causing the wavelengths to shorten.

Front

What is a Red Shift?

Back

A Red Shift occurs when a light source moves away from an observer, causing the wavelengths to lengthen.

Front

How does the Doppler Effect apply to sound waves?

Back

As a sound source approaches, the sound waves compress, leading to a higher frequency (higher pitch). As it moves away, the waves stretch, leading to a lower frequency (lower pitch).

Front

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

Back

As frequency increases, wavelength decreases, and vice versa.

Front

What type of shift is observed when a star is moving away from Earth?

Back

Red Shift.

Front

What type of shift is observed when a star is moving towards Earth?

Back

Blue Shift.

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.