ESPN News Flash: Cincinnati has been ordered to wear eye shields on their face masks. Why is this?
Huh? The one that comes from the factory, I guess
The snow does not form a perfectly flat reflective surface on the sign. The shape of the snow crystals causes the light to reflect off of it in several different directions and not just straight back to your eyes. When little or no light is reflected back to your eyes, everything will appear black. In physics, black is the absence of all colors of light.
