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

- Wavelength Calculator
- Wave Speed Calculator
- Relative Frequency Calculator
- Wavenumber Calculator
- Redshift to Velocity Calculator
- Doppler Shift Velocity Calculator

## 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

## Doppler Effect Definition

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 moving objects, the observed frequency changes to the observer.

## Doppler Effect Example

How to calculate the doppler effect?

**First, measure the emitted frequency.**Measure of calculate the emitted frequency.

**Next, determine the wave velocity.**Measure or calculate the wave velocity.

**Next, determine the receiver velocity.**Measure or calculate the velocity of the receiver.

**Next, determine the source velocity.**Measure or calculate the source velocity.

**Finally, calculate the doppler effect.**Calculate the doppler effect using the formula above.

## FAQ

**What is the doppler effect?**

A doppler effect is the changed perceived frequency of a wave due to the relative velocities between source and receiver.