A brilliant rainbow band covering the lake is an optical phenomenon formed by ice crystals that refract sunlight.
On March 24, amateur photographer Cessna Kutz shared a photo of a horizontal rainbow spanning the surface of Sammamish Lake in Washington state, U.S., to Facebook. Kutz takes the first wide-angle shot of his welcome window around 2 p.m. local time, while the second is a close-up shot.
According to Courtney Obergfell, a meteorological expert at the National Weather Service in Seattle, US, this could be the result of the rainbow of fire. “This optical phenomenon is an aura of ice formed by the refraction of sunlight by ice crystals in the atmosphere. In its full form, it can appear as a horizontal rainbow colored stripe under the face. . God, ”Obergfell explained.
According to the School of Geography at the University of Santa Barbara, a fiery rainbow only appears when the sun is 58 degrees above the horizon. Bands of bright colors that run parallel to the horizon form when sunlight passes through overhead clouds or fog containing flat ice crystals. When aligned, ice crystals act like lenses that refract light and the intensity of the refraction is maximized when the Sun is at an angle of 68 degrees.
The popularity of fireballs depends on geographic location. In the United States, arcs of fire typically appear several times a year, but are rarer in areas like northern Europe. This phenomenon cannot be seen in countries above 55 degrees north or 55 degrees south because the sun always rises below 58 degrees, according to the World Meteorological Organization.