Which situations might cause two observers (A and B) to measure different

Question

frequencies for the same vibrating object? Select the two correct answers.
(1 point)
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 is stationary and Observer B is moving
Observer A and Observer B are both stationary and at the same distance from the
object.

Answer 1

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

1. Observer A and Observer B are moving at different speeds relative to each other. (This will cause a Doppler effect, leading to different frequency measurements.)

2. Observer A is stationary and Observer B is moving. (The moving observer will also experience the Doppler effect, resulting in a different frequency measurement compared to the stationary observer.)

The other options would not lead to different frequency measurements since both observers are either stationary and at the same distance from the object or simply at different distances without relative motion affecting the frequency perception.