A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is f_1. If the train's speed is reduced to 17 m/s, the frequency…

Question

A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is f_1. If the train's speed is reduced to 17 m/s, the frequency registered is f_2. If the speed of sound is 340 m/s then the ratio f_1/f_2 is

Accepted Answer

Correct answer: D. (d) f_1=f ( VV-V_s ) f_1=f ( 340340-34 )=f ( 340306 ) and f_2=f ( VV-V_s )= ( 340340-17 )= 340323f f_1f_2= 323306= 1918

$A train moves towards a stationary observer with speed 34 m / s . The train sounds a whistle and its frequency registered by the observer is f_{1} . If the train's speed is reduced to 17 m / s, the frequency registered is f_{2} . If the speed of sound is 340 m / s then the ratio f_{1} / f_{2} is$

Solution

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