The Doppler Effect Video Lessons

Video Thumbnail

Concept

Problem: A student knows that an ambulance siren has a frequency of fs = 399 Hz. He measures, when the ambulance is approaching him.  The frequency fo = 414 Hz. Assume the speed of sound is v = 343 m/s in this problem.If ambulance is moving away with the same speed (vs = 12.89 m/s), what is the wavelength measured by the student in meters?

FREE Expert Solution

Change in frequency when the source is moving away:

f0=vv + vsfs

81% (113 ratings)
View Complete Written Solution
Problem Details

A student knows that an ambulance siren has a frequency of fs = 399 Hz. He measures, when the ambulance is approaching him.  The frequency fo = 414 Hz. Assume the speed of sound is v = 343 m/s in this problem.

If ambulance is moving away with the same speed (vs = 12.89 m/s), what is the wavelength measured by the student in meters?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Doppler Effect concept. You can view video lessons to learn The Doppler Effect. Or if you need more The Doppler Effect practice, you can also practice The Doppler Effect practice problems.