A train is moving towards a stationary observer. Which of the following curve best represents the frequency recived by observer `f` aas afunction of time?

A train is moving towards a stationary observer. Which of the following curve best represents the frequency recived by observer f as a function of time?

An observer is moving towards the stationary source of sound, then

A sound source is moving towards a stationary observer with 1/10 of the speed of sound. The ratio of apparent to real frequency is

A sound spurce is moving towards a stationary observer with 1/10 of the speed of sound. The ratio of apparent to real frequency is

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 of 340 m//s , then the ratio f_(1)//f_(2) is

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 of 340 m//s , then the ratio f_(1)//f_(2) is

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 speed of train is reduced to 17 m/s, the frequency registered is f_(2) . If speed fo sound is 340 m/s, then the ratio f_(1)//f_(2) is :

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 speed of train is reduced to 17 m/s, the frequency registered is f_(2) . If speed fo sound is 340 m/s, then the ratio f_(1)//f_(2) is :