What is Tyndall effect?
[[Image:Bluishgrayeye.JPG|thumb|180px|A blue [[iris (anatomy)|iris]]]] The '''Tyndall effect''' is when [[light]] is scattered by particles of matter in its path. It makes a beam of light visible by lighting the particles. Under the Tyndall effect, the longer-[[wavelength]] light is more transmitted while the shorter-wavelength light is more reflected by [[wikt:scatter|scattering]]. In effect, blue light is scattered much more strongly than red light. The blue of a clear [[sky]], and the blue of blue eyes is caused by the Tyndall effect, not by a [[pigment]]. Its named after John Tyndall. Tyndall effect can also be observed when sunlight passes through the canopy of a dense forest. It happens due to the scattering of light by the particles of smoke and dust. {{physics-stub}} [[Category:Light]]