Enter the emitted frequency, wave velocity, receiver velocity, and source velocity. The calculator will evaluate and display the observed frequency.

## Doppler Effect Formula

The following formula is used to calculate the observed frequency of the doppler effect.

f = f0 * (v + vr) / (v + vs)

- Where f is the observed frequency
- f0 is the emitted frequency
- v is the wave velocity
- vr is the receiver velocity
- vs is the source velocity

## What is the doppler effect?

The doppler effect is a term used in science to describe the changing of the frequency of a wave when it’s moving relative to an observer. When the waves are emitted on a moving objects, the observed frequency changes to the observer.

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