30 Oct '15, 5pm

An #Arduino based Newton's disk

During the past days I was busy with the preparation of a scientific exhibition that opened on September 25 for the European Research Night. The year 2015 is the International Year of the Light , as declared by the UN, hence the theme of the exhibition is the Light and its scientific applications. We were working on a Newton's disc, when I came to the idea that one can easily build an electronic version of such a device. A Newton's disc is a disc divided in segments, each of which has a different color. When the disc spins rapidly, the coloured segments fade and the disc appears to be white. The Newton's disc is used to demonstrate that white light is in fact the superposition of light beams of different colours. The reason for which the disc appears to be white is that images collected by our eyes persists on the retina for a while (1/20 of a second). When the disc spins ...

Full article: http://www.element14.com/community/groups/arduino/blog/20...

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