What kind of light can not pass through materials?

If you're asking for what light cannot touch, then there is nothing. Other than air, light acts on everything. If light did not reflect off of objects, they would be invisible.

EDIT: Visible light cannot penetrate a mirror. If the mirror is of suitable quality, most of the light should be reflected, with the remainder being absorbed.

EDIT: light acts on air, it does not act on a vacuum, it travels straight thru it. with air however, light is difracted