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airy disc

 - 1 dictionary result

Airy disc

[air-ee]
–noun Optics.
the bright central part of the diffraction pattern of light from a point source that is diffracted by a circular aperture.

Origin:
named after Sir George Biddel Airy (1801–92)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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