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Newton's Rings

Newton's Rings
A curved piece of glass resting on a flat piece of glass creates colorful concentric bands, called Newton’s Rings. The rings are caused by light waves reflecting from the two surfaces and interfering, or combining, with each other. A band of color appears wherever the distance between the two pieces of glass causes light of that color to interfere constructively, making the waves bouncing off the two surfaces reinforce each other. At these places, light waves of other colors interfere destructively and tend to cancel each other out.
Lester V. Bergman/Corbis
Appears in these articles:
Optics; Interference (wave motion)
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