Physics Asked by fadedbee on January 29, 2021
A child’s jigsaw puzzle came with two pairs of cheap cardboard-framed 3D glasses.
The glasses had thin plastic film in them, as lenses.
These thin flat plastic lenses bend about 99% of visible light by around 5-10 degrees. You can see a very faint image of the unbent scene.
This produces a weak 3d effect when parts of an image have a black halo.
What is this thin film than bends light?
Why are the black halos required?
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