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Mirage - What is a Mirage? - Young People's Trust For the Environment

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This type of mirage is also called the Fata Morgana or hafgeringar in the Icelandic language. An exceptional mirage can be right-side up or upside down, depending on the distance of the real item and the temperature gradient. Often the image looks like a distorted mixture of up and down parts.

This was observed and documented in 1596, when a ship looking for the Northeast passage ended up being stuck in the ice at Novaya Zemlya, above the Polar circle. The Sun appeared to rise two weeks earlier than anticipated; the real Sun had actually still been below the horizon, however its light rays followed the curvature of the Earth.

For every single 111. 12 kilometres (69. 05 mi) that light rays take a trip parallel to the Earth's surface, the Sun will appear 1 higher on the horizon. The inversion layer must have just the ideal temperature level gradient over the whole range to make this possible. In the same method, ships that are up until now away that they need to not be noticeable above the geometric horizon may appear on or even above the horizon as exceptional mirages.

What Is A Mirage, And How Does It Occur?

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These are examples of so-called Arctic mirages, or hillingar in Icelandic. If the vertical temperature gradient is +12. 9 C per 100 meters (where the positive indication implies temperature gets hotter as one goes higher) then horizontal light rays will simply follow the curvature of the Earth, and the horizon will appear flat.

In some scenarios, distant items can be raised or lowered, extended or shortened with no mirage involved. Fata Morgana [edit] The same sequence as an animation. A Fata Morgana (the name originates from the Italian translation of Morgan le Fay, the fairy shapeshifting half-sister of King Arthur) is an extremely complicated superior mirage.

A Fata Morgana is likewise a fast-changing mirage. Fata Morgana mirages are most common in polar areas, especially over large sheets of ice with an uniform low temperature level, however they can be observed practically anywhere. In polar regions, a Fata Morgana may be observed on cold days; in desert areas and over oceans and lakes, a Fata Morgana may be observed on hot days.