1. The Doppler Effect

2. What is the Doppler Effect?
The Doppler effect is a quantitative analysis that shows how the frequency heard by a stationary observer depends on whether the observer sees the source approaching or receding
This means that waves have different observed frequencies when the wave source is in motion

3. A Diagram
Sound waves
Direction of motion

4. Equations for a moving source
The equation for a receding object is
The equation for an approaching object is

5. Equations for a moving observer
For an observer moving towards the source
For an observer moving away from the source

6. For light waves
When light waves are emitted from a source moving away from you the light appears to be redshifted, as it is distorted back in the color spectrum towards red
Also, when light is emitted for a source moving towards you it appears to be blueshifted, or moved up in the color spectrum towards blue

7. Diagram of light shifting
Light waves
Direction of motion

8. The Doppler double shift
This occurs when a wave is reflected off of a moving object and it indicates the frequency shift and it has application in detecting blood flow rates and radar