3D videos aren't exactly new, but watching them in the theaters has become more and more mainstream over recent years. Not just in theaters, though, technology has evolved to let us see these videos in the comfort of our homes. But how do they work? How exactly do we see a 2D image and a 3D image at the same time?
Turns out it all has to do with our eyes. These videos are shot in such a way that our eyes see the images at different rates and then our brains fill in the gaps. So for some videos they might use red and blue lights to filter the images differently, while in most theaters we use polarized glasses.
For this one, though, this man uses a technique called the Pulfrich Effect in which the image in background is constantly moving and two images are transposed atop each other to make our brains think we're seeing a 3D image. A little nausea inducing, but truly interesting science. And definitely something you'll want to share with your kids!
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