Why can you not see through fog when it’s ahead of you but you can once you’re in it?
In: Physics
Assuming you mean while driving. It’s because the fog is reflecting light from your headlights back at you, and that light is brighter than the actual landscape/road. So all you see a wall of white reflected light.
Behind you there are no headlights, so the brightest source of light is the dimly lit landscape/road.
This is why fog lights are mounted higher or lower than the normal headlights. The light reflected back from the fog is not as direct.
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