Malus Law

Malus Law

### Formula

$$I=I_0\cos^2\theta$$

### Terminologies

- I → Intensity of transmitted light.

- I0 → Initial intensity.

- θ → Angle between transmission axes.

### Conditions / Special Cases

Maximum intensity:

$$\theta=0^\circ$$

Zero intensity:

$$\theta=90^\circ$$

### Usage

- Used in polarizer-analyzer problems.