Watch the whole lesson on http://ed.ted.com/lessons/how-do-we-see-color-colm-kelleher

Have you ever wondered what color is? In this first installment of a series on light, Colm Kelleher describes the physics behind colors-- why the colors we see are related to the period of motion and the frequency of waves.

Lesson by Colm Kelleher, animation by Vitreous.

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