You are standing near a railway track and a train is moving toward you at 100 kph and blowing its whistle.What will you notice as the train moves past you?

Question

Quizplus · Accepted Answer

This is an example of the Doppler effect, where the frequency of the sound waves changes depending on the relative motion between the source and observer. As the train approaches, the sound waves are compressed, leading to a higher pitch. As it moves away, the sound waves are stretched, leading to a lower pitch. Therefore, the horn will sound higher in pitch as the train approaches. Choices A, C, and D are not related to the Doppler effect.

You Are Standing near a Railway Track and a Train