7.4 - Reflection of Sound
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Practice Questions
Test your understanding with targeted questions
What is the angle of incidence?
💡 Hint: It's the starting angle before sound reflects.
What do we call the reflected sound that we hear after a delay?
💡 Hint: Think about the sound coming back to you.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the angle of incidence equal to?
💡 Hint: Think about how they interact with surfaces.
An echo can only be heard if the distance is at least how many meters?
💡 Hint: Remember the minimum distance for sound to travel and return.
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Challenge Problems
Push your limits with advanced challenges
If a sound wave travels at 344 m/s, calculate how long it takes for a sound to echo back after reflecting off a wall 40 meters away.
💡 Hint: You need to consider the total distance since sound travels to the wall and back.
In a room, if the reverberation time is 2 seconds, how many times does the sound reflect to create that effect? Assume the sound continues to decay gradually.
💡 Hint: Think about how many reflections would allow you to hear a sound for that duration.
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