The Doppler Effect (Leaving Cert Physics): Flashcards

Apparent change in frequency of waves due to relative motion between source and observer

Increases (higher pitch/blue shift)

Decreases (lower pitch/red shift)

Source moving away, wavelength increases

Source moving towards, wavelength decreases

$f' = f \times \frac{c}{c - u}$

$f' = f \times \frac{c}{c + u}$

340 m/s

$3.00 \times 10^8$ m/s

c-u for coming closer, c+u for going away

Examines blood flow and internal structures

Weather forecasting and traffic speed detection

Ambulance siren pitch change as it passes