Uploaded April 2025 | Updated September 2026, 1 week ago

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This optics magic trick shows why two prisms stacked up don't act like a solid rectangle of glass... until you add some water

These concepts are used to manipulate light in everything from medical devices, to laser welding, to the inside of cameras

We have lots of educational optics demos like this on our channel!

#optics #science #physics #stem #photonics #laser #prism