Use projection theory to explain why a 3-D movie can produce a constant depth (when measured in terms of the percentage towards or away from the viewer) independent of where the observer is in the room.

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Use projection theory to explain why a 3-D movie can produce a constant depth (when measured in terms of the percentage towards or away from the viewer) independent of where the observer is in the room.



3D movies are created by optical illusions, or a combination of cinematography and optics. The majority of 3D films are actually two films playing at the same time; each one has been designed so it's meant to be viewed by either your left eye or your right eye. The 3D glasses you wear filter those images, making sure they're interpreted correctly by your optical sensors (i.e. your eyes). Your eyes and brain naturally combine two images into one; it's the basic principle of sight. When this happens with the two images from a 3D film, you get a layered optical illusion that creates three-dimensional depth.

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