The type of telescope that uses grazing incidence is a X-ray telescope.

Here's why:

* X-rays and Reflection: X-rays have very high energy and are difficult to reflect using traditional mirrors. They tend to pass right through most materials.

* Grazing Incidence: Grazing incidence mirrors are designed to reflect X-rays at very shallow angles (close to 90 degrees). This allows the X-rays to "graze" the surface of the mirror and be reflected, rather than passing through it.

* Focus: By using multiple grazing incidence mirrors, X-ray telescopes can focus incoming X-rays to create an image.

Examples of X-ray telescopes that use grazing incidence:

* Chandra X-ray Observatory

* XMM-Newton

* NuSTAR

These telescopes allow us to study the universe in X-rays, revealing phenomena like black holes, supernova remnants, and active galactic nuclei.