1. Fogging on the mountain after the rain is due to the ground heat dissipation and the temperature drop after the rain. When the air is cooled to a certain extent, part of the water vapor in the air will condense into tiny water droplets and be suspended in the air layer near the ground. If there is no wind on the mountain, the suspended water droplets will not spread easily, thus forming fog.
2. Fog is small suspended water droplets, and light is difficult to penetrate and diffract in the air. What people see with the naked eye is a piece of white, which is white fog.