What is the Darding effect?

Tyndall phenomenon is formed by the scattering of visible light (wavelength is 4~7nm) by dispersive particles in colloid.

When a beam of light passes through the colloid, a bright "path" can be observed in the colloid from the direction perpendicular to the incident light, and the appearance of Tyndall effect also implies that light can be seen.

It is also called "Jesus Light" in photography, which usually appears in the early morning, at sunset or when there are more clouds after rain, and there is fog or dust in the atmosphere. The sun just shines on it, and it is divided into strips, sometimes into a large piece, which is particularly spectacular.