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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 sound changes as an object moves towards or away from you.
Question 2
Easy
Give an example of the Doppler Effect in everyday life.
💡 Hint: Consider sounds from vehicles.
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 is the formula for the Doppler Effect when the observer is moving towards a stationary source?
- f' = f_s (v + v_O) / v
- f' = f_s (v - v_O) / v
- f' = f_s v / (v - v_S)
💡 Hint: Consider the observer's speed and how it impacts the observed pitch.
Question 2
True or False: Redshift occurs when a celestial object is moving toward an observer.
- True
- False
💡 Hint: Think about the color changes and how they might relate to distance.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A ship is sailing towards the coast at 15 m/s, and it uses a horn that emits a sound of 300 Hz. Calculate the frequency heard by a person standing on the shore assuming the speed of sound in air is 340 m/s.
💡 Hint: Make sure to apply the correct values in the formula carefully.
Question 2
A distant galaxy is moving away from the Earth at a speed of 3000 km/s. If the emitted light wavelength is 600 nm, calculate the observed wavelength using the formula Δλ/λ = v_r/c.
💡 Hint: Convert the velocity into the same units as the speed of light for accurate calculation.
Challenge and get performance evaluation