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Color Mixing with LCD and AMOLED

Yesterday we were delighted to receive a visit from a colleague, Heidi Baumgartner, who developed this microscope that can be 3D-printed and constructed from a screw and some small glass ball-bearings. We spent some time outside, then spent some time using the microscope with our smartphones to take pictures. It wasn't long before we started using the microscope to look at our smartphones. What we found was beautiful (see a video here), and led to an exploration into how colors are generated by the screen...and a deeper understanding of the basic physics of color addition and subtraction. You might have noticed that white backgrounds generated by various mobile devices are not equally white.

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