10 Awesome Demonstration Experiments on Light, Spectrum, and Color
Did you know the yellow you see on your smart phone doesn’t actually contain the color yellow? It’s true! Watch this revealing video to see this, AND that there’s more to studying light and color than meets the eye.
http://www.arborsci.com/cool/behind-the-scenes-with-light-color-10-great-demos
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Is it possible to use a similar device to identify the element of a metal surface?