What happens when light shines at an angle on a flat surface?
Depends on the angle, and the surface all the way to temperature, an asphalt road can be reflective, a small aperture straightens light passing through from a close view, the first pinhole cameras would only allow one ray of light to display an inverted image on the film at the back of the camera and the photon would be polarized to the closest edge it passed by. Light reflected by a puddle of water will be polarized vertically to the puddle. It would seem the surface inverts the photon and either reflects it or absorbs it and radiates the photon as its own with the electron identifiers from which dropping electron emitted the photon.