Dutch water company SPA Nederland believes in the purity of their product. To prove how clean and clear their water is, they employed scientists to use a drop of SPA Nederland water as a camera lens.

It sounds crazy, right? Ultimately, anything can act as a functional lens so long as it can refract light to converge at a single point. The scientists in the video below placed an aperture diaphragm with a piece of glass – coated with water-repellant – in front of a camera sensor. They then placed a water droplet on the glass and...
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