Which statement best describes how the black spectrum of the

Last updated: 8/9/2022

Which statement best describes how the black spectrum of the car horn when it is stationary compares to the red spectrum of the car horn when it is approaching the recording equipment? When the car is approaching the recording equipment, the red spectrum is shifted to the right compared to when the car horn is stationary. When the car is approaching the recording equipment, the red spectrum is not shifted compared to when the car horn is stationary. When the car is approaching the recording equipment, the red spectrum is shifted to the left compared to when the car horn is stationary.