Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the two correct answers. (1 point)

Question

Responses

Observer A is stationary and Observer B is moving.
Observer A is stationary and Observer B is moving.

Observer A and Observer B are stationary but at different distances from the vibrating object.
Observer A and Observer B are stationary but at different distances from the vibrating object.

Observer A and Observer B are moving at different speeds relative to each other.
Observer A and Observer B are moving at different speeds relative to each other.

Observer A and Observer B are both stationary and at the same distance from the object.

Answer 1

The two correct answers that can cause two observers (A and B) to measure different frequencies for the same vibrating object are:

1. Observer A is stationary and Observer B is moving.

   • This situation can lead to a difference in the frequency observed due to the Doppler effect, where the frequency perceived by a moving observer differs from the frequency emitted by the vibrating object.

2. Observer A and Observer B are moving at different speeds relative to each other.

   • This can also cause a difference in the frequency perceived by each observer due to the Doppler effect, as the frequency changes based on the relative velocity between the observer and the source of the sound.

The other options do not lead to different frequency measurements in the context provided.