Answer:
1- Observed frequency increases when moving towards the car
2-Observed frequency decreases when moving away from the car
Explanation:
When bus moving towards the car;
Let,
f= frequency observed by the person
c= propagation speed of waves in air
Vr= velocity of person
[tex]f_0{}[/tex]= frequency of emission of waves by the car
The transmission velocity of waves will change;
[tex]f=(\frac{c+Vr}{c})} f_0{}[/tex]
i-e observed frequency increases
When bus moving away from the car;
The transmission velocity of waves will change as;
[tex]f=(\frac{c-Vr}{c})f_0{}[/tex]
i-e observed frequency decreases
