I need help to understand what is happening when I project a image in a sheet of glass. Imagine this picture, a projector as the light source projecting a image in a sheet of glass: 1: I have high transmission. (the light that pass away the sheet of glass) 2: Low absortion 3: A so so reflection (part of the light is reflected at my wall) 4: Low Scattering 5: Refraction ? The light that pass the sheet of glass make a image on the other side of the projector(transmission), but the image appears too in the sheet of glass. Is the image that appear in the sheet of glass a absortion or a refraction?