Doppler Effect

Question 1

What is the doppler effect

Answer 1

The apparent change in frequency of a wave due to the relative motion of a source and an observer

Question 2

observed frequency equation explain each symbol

Answer 2

f’ = f((v±v_o)/(v±v_s))
letters after _ are subscripted
f’ = observed frequency
f = frequency of sound
v = speed of sound
v_o = speed of observer
v_s = speed of source

Question 3

when observer moving

Answer 3

v + v_o (closer to source)
v – v_o (further from source)

Question 4

when source moving

Answer 4

v – v_s (closer to observer)
v + v_s (further from observer) and

Question 5

uses of doppler effect

Answer 5

measuring speeds of vehicles

Question 6

experiment to measure speed of moving car with doppler effect

Answer 6

1. the doppler effect states that the observed and emitted frequency are different due to relative velocity
2. waves are reflected off the car, causing a doppler shift
3. wavefronts squished, wavelengths shorten frequency increases
4. wave speed remains the same