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- 09:52, 25 April 2022 Physdemo talk contribs created page Mirage (Created page with "{{NewDemo|subject=Light and Optics|topic=Geometrical Optics|file1=Real Image.gif}} A box is constructed such that a lightbulb is hanging upside-down inside the box. A large concave mirror is placed behind the box, which causes an image of the lightbulb in the box to appear on top of the box. A "dummy" lightbulb that is not connected to a voltage source is screwed into the socket on top of the box. The image projected of the lit lightbulb inside the box makes the dummy l...") Tag: Visual edit: Switched