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AP® Physics 1 & 2

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Moderate

Sound of Doppler Effect

APPH12-LDHOSE

A car sounding its horn drives past a child standing still on the sidewalk.

Which of the following is an observation that can be explained by the Doppler Effect?

A

The horn sounds quiet when the car is far away and loud when the car is close.

B

The pitch of the horn seems to change as the car goes past the student.

C

From a distance, the student is able to see the driver push the horn before the student can hear the horn.

D

The student is able to hear other sounds at the same time as they are hearing the sound of the horn.