To determine what the stick figure in the road is experiencing in terms of the Doppler effect, we need to consider the relative motion between the sound source (e.g., a vehicle) and the observer (the stick figure).
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If the sound source is moving toward the observer: The frequency of the sound waves will increase as the source approaches, resulting in a higher pitch sound. Therefore, the correct answer would be:
- c Higher pitch sound due to a higher frequency.
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If the sound source is moving away from the observer: The frequency of the sound waves will decrease, resulting in a lower pitch sound. In this case, the correct answer would be:
- a Lower pitch sound due to a lower frequency.
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If the sound source is stationary relative to the observer: The frequency perceived by the observer would remain consistent, leading to:
- b Consistent sound because the frequency stays the same.
To determine the correct option, one needs to know the direction of movement of the sound source relative to the observer. If the source is approaching, it’s higher pitch; if it’s receding, it’s lower pitch; if it’s stationary, the frequency remains the same.
1 answer