You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you
A)As the train approaches, the horn will sound lower in pitch than when the train is moving away.
B)As the train approaches, the horn will sound higher in pitch than when the train is moving away.
C)There will be no change in the pitch of the horn as it moves by.
D)The horn will get louder as the train moves away from you.
E)The horn will get quieter as the train moves toward you.

Question

Quizplus · Accepted Answer

This is an example of the Doppler Effect. As the train approaches, the sound waves from the horn are compressed, resulting in a higher pitch. As the train moves away, the sound waves are stretched out, resulting in a lower pitch.

You Are Standing near a Railroad Track and a Train