Tyndall effect
Videos
The Tyndall effect is light scattering by particles in a colloid such as a very fine suspension. Also known as Tyndall scattering, it is similar to Rayleigh scattering, in that the intensity of the sc
The Tyndall effect in opalescent glass: it appears blue from the side, but orange light shines through.
A blue iris with some melanin
Sunbeam exhibiting Mie scattering instead of Tyndall scattering.
Fog scattering traffic light
Rock flour
Videos
Rock flour, or glacial flour, consists of fine-grained, silt-sized particles of rock, generated by mechanical grinding of bedrock by glacial erosion or by artificial grinding to a similar size. Becaus
Tyndall effect
…of the suspended particles preferentially back scattering shorter wavelengths of the visible spectrum while absorbing longer wavelengths. Milky white rock flour combined with the blue tint caused by the Tyndall effect produces the characteristic “turquoise blue” often seen in meltwater streams. The actual shade…
Rock flour from glacial melt enters Lake Louise, Canada
Rock flour intensifies the water's hue at Hokitika Gorge on the West Coast of New Zealand
Muru river pours rock flour into Gjende lake, Norway
Östra Blanktjärn Lake in Vålådalen Nature Reserve, Sweden