Given a slit of width ** w** and a light source with wavelength

**, the diffraction pattern will be given by the formula:**

`lambda`lambda sin( theta ) = m -------- w

where ** m** = 1, 2, 3 .... Solving for

**gives you the angles at which the dark bands in the diffraction pattern appear.**

`theta`Diffraction is an example of light's wave-like (as opposed to particle-like) behavior.