Visualizing Air Flow Using Schlieren Optics

The Best of the Web Sifted. Sorted. Summarized. Visualizing Air Flow Using Schlieren Optics   Harvard’s Department of Natural Sciences demonstrates an optical technique known as Schlieren Optics, that allows us to see small changes in the index of refraction in air. A point source of light is reflected from a concave mirror and focused onto the edge of a razor blade, which is mounted in front of the… Read more » Truck Makes Record Breaking 83 ft Jump Over a Moving F1 Car   EMC and Lotus F1 teamed up for a record-breaking stunt, as a giant semi-truck jumped a distance of 83 ft and 7 inches (25.47 meters) while an F1 car drove underneath the airborne big rig. You can find full video and special behind scenes footage at EMC.     Read more » Beautiful Ballpoint Pen Drawings by Marite Desaine   Mārīte Desaine is an artist from Latvia. In the series below we explore the artist’s amazing ballpoint pen drawings. Each piece takes approximately 30 hours and the unmistakeable pen strokes create a really interesting drawing style. You can see much more of Desaine’s work (which includes digital illustrations and watercolor paintings) on deviantART. If… Read more » How To Cup Rope Without Scissors or a Knife   Learn how to cut rope or string in a pinch when you don’t have any scissors or knives handy. A great life hack trick to help you in an emergency! If you enjoyed this video, you can see many more from Dave Hax on YouTube.     Read more »

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