Resonance in Air Column

Resonance in Air Column

### Open Pipe

$$L=n\frac{\lambda}{2}$$

### Closed Pipe

$$L=(2n-1)\frac{\lambda}{4}$$

### Terminologies

- L → Length of air column.

- λ → Wavelength.

- n → Harmonic number.

### Conditions / Special Cases

- Open pipe:

$$n=1,2,3...$$

- Closed pipe:

$$n=1,2,3...$$

Only odd harmonics are present.

### Usage

- Used in organ pipe problems.