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An Arago spot of electrons, which also constitute matter waves, can be observed in transmission electron microscopes when examining circular structures of a certain size. The observation of an Arago spot with large molecules, thus proving their wave-nature, is a topic of current research.
Garden of the Gods (Arapaho: Ho3o’uu Niitko’usi’i) is a 1,341.3-acre (542.8 ha) public park located in Colorado Springs, Colorado, United States. [ 1 ] 862 acres (349 ha) of the park was designated a National Natural Landmark in 1971.
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The light diffracted around the edge of a perfectly circular occluder interferes constructively at the central axis, producing a bright spot known as the Arago spot.The resolution at that point would be equal to the resolution of a conventional lens with the same size as the occluder, although the light would be much less intense. [1]
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The zone plate's focusing ability is an extension of the Arago spot phenomenon caused by diffraction from an opaque disc. [2] A zone plate consists of a set of concentric rings, known as Fresnel zones, which alternate between being opaque and transparent. Light hitting the zone plate will diffract around the opaque zones.
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