Technically, what a hologram is, is a technique that records the light from an object which is then presented in a 3D way. However, we are focused on the ”holographic effect”, which is the optical illusion of having either a still image or video content floating in the air.
Holograms are also known as the ”Pepper’s Ghost illusion”, used since the 18th century to create transparent ghostly images in places such as theatres.
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