What does Tyndall phenomenon mean?

The Tyndall phenomenon is a scattering phenomenon of light.

The Tyndall effect means that when a beam of light passes through a colloid, a bright "pathway" can be observed in the colloid from the direction of vertical incident light. "When the Tyndall effect occurs, light has "

During the propagation of light, when light strikes particles, if the particles are many times larger than the wavelength of the incident light, reflection of the light will occur; if the particles are smaller than the wavelength of the incident light, reflection of the light will occur. Scattering, what is observed at this time is the light waves surrounding the particles and radiating around them, which is called scattered light or opalescence.

The photography industry also calls it "Jesus light". It usually appears in the early morning, at sunset or when there are more clouds after rain. There is fog or dust in the atmosphere, and the sun happens to be projected on it, dividing it into a line. Strips, sometimes a large piece, look particularly spectacular.

The reason for the Tyndall effect

The reason for the Tyndall effect is that during the propagation of light, when light irradiates particles, if the particles are many times larger than the wavelength of the incident light, then Reflection of light occurs; if the particle is smaller than the wavelength of the incident light, scattering of light occurs. At this time, what is observed is the light wave surrounding the particle and radiating around it, which is called scattered light or opalescence.

The Tyndall effect is the scattering phenomenon of light or opalescence. Since the diameter of true solution particles generally does not exceed 1nm, colloidal particles are between solute particles and turbid liquid particles in the solution, with a diameter of 1-100nm.

This phenomenon generally occurs in the early morning, at sunset, or after rain when there are more clouds and there is fog or dust in the atmosphere. The sun just shines on it and is divided into strips, sometimes into a large piece, which looks particularly spectacular.

Reference for the above content: Baidu Encyclopedia-Tyndale Effect