Practice - Phenomenon of Frequency Change
Practice Questions
Test your understanding with targeted questions
What happens to the frequency of a sound when the source is moving towards an observer?
💡 Hint: Think about how sirens sound as they come closer.
What happens to the frequency when the observer moves away from the stationary source?
💡 Hint: Contrast with when the observer moves towards the source.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the Doppler effect?
💡 Hint: Remember, it’s all about motion affecting waves!
How does the Doppler effect apply when a source is moving away from an observer?
💡 Hint: Think of how an ambulance sounds when it drives past.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A stationary source of music produces a frequency of 440 Hz. Calculate the frequency heard by an observer running towards the source at 10 m/s when the speed of sound in air is 340 m/s.
💡 Hint: Substituting values will give you a new frequency!
A source moving away at a speed of 5 m/s emits a frequency of 1000 Hz. What frequency is detected by a stationary observer if the speed of sound is 340 m/s?
💡 Hint: Remember to use the formula for a source moving away!
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.