Diffraction Minimum Condition

Diffraction Minimum Condition

### Formula

$$a\sin\theta=n\lambda$$

### Terminologies

- a → Width of slit.

- θ → Angle of diffraction.

- n → Order of minimum.

- λ → Wavelength.

### Conditions / Special Cases

For first minimum:

$$a\sin\theta=\lambda$$

### Usage

- Used to locate dark bands in diffraction pattern.