# An introduction to Fourier transforms#

## What is a Fourier transform?#

The Fourier transform is fundamental to the scattering of all radiation, including **neutrons**.
The scattering interaction between radiation and some sample essentially performs a Fourier transform on the radiation, leading to the scattering pattern that we measure..

Before we look in more detail at Fourier transforms and scattering, watch the video below from 3Blue1Brown which gives a great overview of the Fourier transform.

Now let’s take a look at the impact of Fourier transforms in neutron reflectometry.