How do 3D glasses work - Sixty Symbols

A visit to the toilet is included in Professor Phil Moriarty's explanation of 3D glasses. How do 3D films give us that three dimensional effect?

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• #science_technology
• #3d_glasses
• #3d
• #three_dimension
• #3dimensions
• #stereoscopy
• #movies
• #film
• #cinema
• #3d_films