Rayleigh scattering causes the blue hue of the daytime sky and the reddening of the sun at sunset. Rayleigh scattering (pronounced RAY -lee ), named after the British physicist Lord Rayleigh (John William Strutt), is the (dominantly) elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation. Rayleigh scattering does not change the state of material and is, hence, a parametric process . The particles may be individual atoms…
Blood moon. The reason why the Moon takes on a reddish color during totality is a process called Rayleigh scattering. This is the phenomenon responsible for the sky to be blue and the sun to appear yellow.
The Sword of Orion - the three stars that make up the weapon hanging off the belt of this famous celestial hunter. The image showcases the amazing mix of physical and optical processes including atomic emission, Rayleigh scattering, reflection and absorbtion of light, that go on in this star forming region to create this kaleidescope of colours and details.
Hazel eyes are one of the least understood eye colors. This color is semi-rare and is a combination of several other colors including green and brown. Hazel eyes have less melanin than brown eyes, but more than blue eyes. Hazel eyes often appear to shift in color from brown to green. Hazel eyes are a combination of Rayleigh scattering, the principle that makes the sky and blue eyes appear blue, and melanin, the pigment that makes brown eyes brown.
[VIDEO] RAYLEIGH SCATTERING explained by Professor Emeritus Walter Lewin at MIT (and more) For The Love Of Physics. I recommend watching the whole lecture from beginning, the part on color starts at about 28:00 http://youtu.be/SRh75B5iotI?t=27m56s