Question

A sound wave strikes a wall perpendicularly. What is the angle of incidence and
angle of reflection of the sound wave?
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Answer 1

Answer:

the angle of incidence is equal to angle of reflection= 0 degree

Answer 2

Since the sound wave is striking the wall perpendicularly..... therefore the ange of incidence (angle between incident ray and normal) would be 0° ....

And we also know that when a ray strikes perpendicularly the ray retraces is path.... Therefore the angle of reflection would also be 0°