Question

8.
With what velocity should an observer move towards a stationary source so that the
apparent frequency is double of the actual frequency? Velocity of sound in air is 350
ms1

Answer 1

Answer:

given V  

s

​

=0,f  

app

​

=2 f where f is actual frequency and V is velocity of sound  

By substituting above given values we get

2 f=f  

V

V + V  

The

​

 

​

 

⇒2 V=V+V  

The

​

 

⇒V  

The

​

=V

Explanation: