English Explanatory Dictionary

Arago spot

English dictionary entry

Meanings

noun
  1. A bright point that appears at the centre of a circular object's shadow due to Fresnel diffraction.

Word forms

Arago spot Arago spots

Etymology

Named after Dominique-François-Jean Arago, who performed an experiment demonstrating the spot's existence.

Synonyms

Fresnel spot Poisson spot
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