Why is fog transparent when you are in it but opaque when you are outside it?

Question

Whenever I see some fog, it usually is very opaque when I am far away, like cloud, but when I am it, it’s far more transparent, though obviously visibility is decreased

In: Physics

Answer 1

Think of it like a pointillism painting. It looks like a beautiful painting from far away but up close you can see the individual dots and the spaces in between the dots.