Relation Between Intensity and Amplitude

Relation Between Intensity and Amplitude

### Formula

$$I\propto A^2$$

### Terminologies

- I → Intensity.

- A → Amplitude.

### Conditions / Special Cases

- Doubling amplitude increases intensity four times.

$$A_2=2A_1$$

$$I_2=4I_1$$

### Usage

- Used in intensity comparison problems.