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What is the doppler effect? The doppler effect is a scientific phenomenon that occurs when an object moves towards or away from an observer. As the object approaches, it emits sound waves which are compressed and appear to be higher-pitched than their actual frequency. Conversely, as the object recedes from the observer, its sound waves will stretch out and appear lower in pitch than their true frequency. This can be explained by looking at how a car horn changes in tone as it passes you on the highway! This phenomenon is the result of relative changes in both sound waves emitted from the object and those detected by an observer. The pitch will change because as a source moves towards you, its distance decreases which means that for every second your ears receive one wave it previously received two seconds ago! The doppler effect can be mathematically described using simple descriptive equations to show how frequency varies with respect to position. It works like this: F=fv/(∆x) where f is the observed frequency (e.g., 440 Hz), v is velocity of movement away or toward the observer (m/s), ∆x is elapsed time since last contact between emitter and detector, so 0 if detection at same instant as


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