Why can you not see through fog when it’s ahead of you but you can once you’re in it?
In: Physics
Visibility in fog is constant, wherever you are relative to it. Let’s assume there’s fog with 50ft of visibility.
* If you are 500 feet away from the fog, you can see 550 feet before things become fully obfuscated. You therefore can see thru only 50ft of the fog.
* If you are 500 feet into the fog, you can see 50ft in all directions. This means there’s now able to see 100ft diameter of fog, which is effectively twice as much things to see than while standing outside of the fog.
* If you are 40 feet from the edge of the fog looking out, you can effectively see everything outside of it (albeit partially obfuscated), so your visibility is technically infinity.
So if you’re “looking in”, you’re almost guaranteed eventually stop seeing things. But if you are “looking within”, or “looking out”, it feels like you can see more.
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