NORFOLK, Va. — Fog may look light and wispy, but it’s actually made of water, and that means it has weight.
Fog is simply a cloud at ground level, made up of countless tiny liquid water droplets suspended in the air. These droplets are incredibly small, typically around 1 to 20 micrometers in diameter. That’s so small you could fit dozens of them across the width of a human hair. Because they’re so tiny, they fall very slowly and stay suspended, giving fog its misty, floating appearance.
Even with all those droplets, fog is surprisingly sparse. In a typical dense fog, there may only be about one droplet in a cubic inch of air. But when you expand that out over a much larger space, like a cubic mile, it begins to add up…