There are no normal x-ray mirrors. The only way to focus them is to use special grazing mirrors where the x-rays hit them almost parallel to the surface. https

There are no normal x-ray mirrors. The only way to focus them is to use special grazing mirrors where the x-rays hit them almost parallel to the surface. https://science.gsfc.nasa.gov/662/instruments/mirrorlab/xoptics.html https://science.gsfc.nasa.gov/662/instruments/mirrorlab/xopt...