<p>This invention relates to a method of forming a mirage phenomenon by forming a structure of at least two phases in which the density of a lower phase is greater than that of an upper phase coming into contact with the former, their density ration (A) is 1 < A < 50, the interface between these phases is a flat surface or a curved surface and which can be seen through. When a real object is seen through at least one of the interfaces of the structure consisting of at least two phases described above, a mirage image of the object can be seen. <IMAGE></p>
