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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the Doppler Effect?
💡 Hint: Think about what happens when a train passes by.
Question 2
Easy
What happens to the frequency of sound when the source is moving towards an observer?
💡 Hint: Recall the term 'blue shift'.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What happens to the frequency of sound when the source approaches the observer?
- Increases
- Decreases
- Stays the same
💡 Hint: Think of a passing ambulance.
Question 2
True or False: A red shift indicates that an object is moving closer.
- True
- False
💡 Hint: What does 'red' in red shift imply?
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A ship sounding a horn with a frequency of 300 Hz moves towards a stationary observer at 15 m/s, while the speed of sound is 340 m/s. Calculate the observed frequency.
💡 Hint: Plug in the values carefully to find the observed frequency.
Question 2
A star emits light at a wavelength of 600 nm. If it is receding at a velocity of 30,000 km/s, calculate the new wavelength.
💡 Hint: Check the speed of light value and remember to add the change to the original wavelength.
Challenge and get performance evaluation