What Happens When Photons Hit Stuff?

Mirrors do bounce things more neatly. It has mostly to do with the conductivity properties of the surface. Conductors are things that don't allow electric fields very deep in the map. A bunch of electrons inside them rearrange themselves to like cancel out any electric field. So photons, when they hit something that's like a mirror, don't go very deep. They bounce right off the surface. Whereas things that are not mirrors like your wall, which is white, doesn't act like a mirror because the photons can get sort of deeper in and interact with things further inside. Because different photons will get different distances inside, they come out a little bit scrambled.