Newton's RingsConstructive interference occurs when an integral number of halfwavelengths occur between the two surfaces (that is, when an integral number of full wavelengths occur between the path of the transmitted beam and the twice reflected beam).Although we see Newton's rings as clear evidence of the wave nature of light, Newton didn't. He thought light consisted of particles. To account for observations like the rings he had a story about the particles having “alternating fits of easy and hard refractability”.
Thin film interferenceThis effect also causes the colors in bubbles and oil films on puddles.
has intentionally blurred sections.
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