A source 
of sound has frequency 
. When the observer ( 
) and the source move towards each other at a speed 
with respect to the ground (as shown in Case 1 in the figure), the observer measures the frequency of the sound to be . However, when the observer and the source move away from each other at the same speed
with respect to the ground (as shown in Case 2 in the figure), the observer measures the frequency of sound to be 
. The value of 
is ……….
Text Solution
Verified by Experts200
(200) For Case 1:
For Case 2 :
From (i) and (ii)
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