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A hologram is a photographic image that is 3-dimensional and appears to have depth.

Holograms work because they have two 2-dimensional pictures, so the "object" can be seen 3-dimensionally. This requires the use of light and a single wavelength to do so. You must use a laser. The reflection makes the hologram viewable in normal lighting like in your home. Two laser beams and a photographic plate must be used for a hologram to work.

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16y ago

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