Atmospheric optics wavelengths. A halo (ἅλως; also known as a nimbus, icebow or gloriole) is an optical phenomenon produced by the interaction of light from the sun or moon with ice crystals in the atmosphere, resulting in colored or white arcs, rings or spots in the sky. Many halos are positioned near the sun or moon, but others are elsewhere and even in the opposite part of the sky. They can also form around artificial lights in very cold weather when ice crystals called diamond dust are floating in the nearby air. There are many types of ice halos. They are produced
Mitchell Nimbus Mitchell Nimbus The Mitchell Nimbus is a series of American, single-seat, high-wing gliders that was designed by Don Mitchell in the 1950s. Mitchell is also well known for his ultralight Mitchell Wing A-10 and U-2 designs. The Nimbus series was designed as an attempt to combine a high aspect ratio wing with a thin airfoil section to produce a fast cross country sailplane. The first Nimbus prototype used a Göttingen airfoil, which resulted in lower than expected performance. The Nimbus III employed an FX-05-191 airfoil and this greatly improved performance. The Nimbus III is constructed entirely from wood and incorporates