Question

Which statement does NOT explain the concept of the Doppler Effect? A) As an observer approaches a stationary sound, the sound waves are compressed, making the pitch higher. B) As an observer moves away from a stationary sound, the sound waves are stretched making the pitch lower. C) As a sound source approaches a stationary object, the sound waves are compressed, making the pitch higher. D) As a sound source moves away from a stationary object, the sound waves

Answer 1

D, as a sound source moves away from a stationary object, the sound waves. It is the opposite of what happens. 

Answer 2

D give credit to monkey