Doppler+Effect

=**Doppler Effect**=

The Doppler Effect was named after Austrian physicist Christian Doppler (1803-1853). 3 Concepts of Doppler Effect: 1. Stationary: In the first situation the listener and object are both stationary. The object emits a sound and the sound waves will move in all directions, even toward the listener. The sound waves are equal, which results in them having the same frequency and wavelength.

2. Object Moving Away From Listener: In this situation, the object is moving away from the listener. This makes it that the listener hears a lower frequency. This is because the wavelengths get farther apart as the object moves away. Equation: fL = fs (1/(1+vs/v))

3. Object Moving Towards Listener: In this situation, the object is moving towards the listener. This makes it that the listener hears a higher frequency. This is because the wavelengths get closer as the object moves closer. Equation: fL = fs (1/(1-vs/v))

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