Doppler Effect Flashcards
1
Q
What is the doppler effect
A
Apparent change in frequency of a wave when there is relative motion between source of wave & an observer
2
Q
Frequency
A
Number of wavefront that pass a given point in one second
3
Q
Pitch
A
How high/deep it sounds
4
Q
Doppler effect application
A
Medicine to determine flow rate of blood
Ultrasound scanning
Measuring heart rate
5
Q
Red shift
A
A shift in spectra of distant galaxies toward longer wavelengths, towards red end spectrum
6
Q
Why would we say the universe is expanding
A
Doppler effects allows us to observe that most stars & galaxies show red shift suggesting that most stars & galaxies are moving away from us. Hence universe expansion
