Doppler Effect Sign Convention

Doppler Effect Sign Convention

### Formula

$$f'=f\frac{v\pm v_o}{v\mp v_s}$$

### Conditions / Special Cases

### Observer Moving Towards Source

$$+v_o$$

### Observer Moving Away From Source

$$-v_o$$

### Source Moving Towards Observer

$$-v_s$$

### Source Moving Away From Observer

$$+v_s$$

### Usage

- Used to avoid sign errors in Doppler problems.