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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• Category

  Science & Technology

[Oliver Møller]

Lol!

If you turn captions "on", Phil says: "which tells you basically in which penis by great" at ca. 04.33 :D

[SentientTurtle]

They are using twin projectors, each with a different polarization filter, for TVs, I think they are using a filter per pixel.

[Tim Pierce]

and why doesn't hitting the white screen of the cinema destroy the polarisation as it would on any other rough surface? since polarity is only maintained on reflective surfaces

[Tim Pierce]

but is circularly polarised light literally 'turning' on its axis? i got impression it was just soime kind of quantum property that is + or -

otherwise you would expect that when the light relfected off the mirror and reversed it's polarisation that it would fit back through the same polariser filter fine, because it would accept light going backward through it the opposite spin to the way light goes forward through it, and the reflected light will be backward and opposite

[SillyEddyPhotography]

Any chance of a follow up for this..? I have some of those RealD 3D glasses from a cinema. From "screen to eye", turning the lenses will make a LCD turn from clear to black... However, looking throught them from "eye to screen", turning them makes the colours change from yellow to blue. Any reason why this would be?

[Rinyuu Kirv]

Very informative video. Though, for me when Phil said he wasn't going to go into depth of 3-D glasses conversion I felt a bit sad. I would like to know how it does that, as that seems very interesting I wouldn't mind if he gave a few days lecture on it. >.>

[funkeeemonky]

Have same glasses B)

[eventfularse]

Wow, so funny...

[rainbowzebra8]

Same

[Donutoftime]

Somehow when I rotate my 3d glasses, It turns yellow and blue some times`