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
Gezira Center for Modern Art as: Mahmoud Sa'id, Ragheb Ayad, Mohammed Naghi, Gazbia Sirry, Inji Eflatoun, Tahia Halim, Abdel Hadi el-Gazzar and Ahmed Morsi. It also has a collection of works by Ibrahim Mohammed Khalil, one of the pioneering innovators of modern Arabic calligraphy in Egypt. The Mahmoud Khalil Museum in Giza displays works by major international impressionist art painters, including Monet, Van Gogh and Gauguin. Gezira Center for Modern Art The Gezira Center for Modern Art, also known as the Egyptian Modern Art Museum, is an art museum for modern and contemporary art, located in Cairo, Egypt. It is part of the National Cultural