Optical diffraction patterns and almost-holograms made with a MOPA laser engraving machine

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Subscribe to see interesting applications of science and technology. You'll see how an electron microscope was built in a home shop, how an X-ray backscatter system works, how to make aerogel, and many other hi-tech projects. Topics usually include electromechanical systems, chemistry, and electronics. Hosted by Ben Krasnow.