Primary rainbow and Second Rainbow A rainbow is an optical and meteorological phenomenon that causes a nearly continuous spectrum of light to appear in the sky when the sun shines onto droplets of moisture in the Earth’s atmosphere. It takes the form of a multicoloured arc, with red on the outside and violet on the inside. A double rainbow includes a second, fainter, arc with colours in the oppsite order, that is, with violet on the out side and red on the inside. References http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/rbowpri.html http://acept.asu.edu/PiN/rdg/rainbow/secondary.shtml http://en.wikipedia.org/wiki/Rainbowhttp://hyperphysics.phy-astr.gsu.edu/hbase/atmos/rbowpri.htmlhttp://hyperphysics.phy-astr.gsu.edu/hbase/atmos/rbowpri.htmlhttp://acept.asu.edu/PiN/rdg/rainbow/secondary.shtmlhttp://acept.asu.edu/PiN/rdg/rainbow/secondary.shtmlhttp://en.wikipedia.org/wiki/Rainbowshapeimage_3_link_0shapeimage_3_link_1shapeimage_3_link_2shapeimage_3_link_3shapeimage_3_link_4
Sundog A sun dog or sundog (scientific name parhelion) is a relatively common atmospheric optical phenomenon associated with the refraction of sunlight by small ice crystals that make up cirrus or cirrostratus clouds. Sundogs typically appear as a bright and colorful patch in the sky at a position 22 degrees or more to the left and/or right of the sun. They are a halo. Reference http://en.wikipedia.org/wiki/Sun_dog http://en.wikipedia.org/wiki/Sun_dogshapeimage_5_link_0