quarter-wave plate

[kwawr-ter-weyv]

quarter-wave plate

[kwawr-ter-weyv]
noun Optics.
a crystal thin enough to cause a phase difference of 90° between the ordinary and extraordinary rays of polarized light, thereby converting circularly polarized light into plane polarized light.


Origin:
1880–85
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Quarter-wave plate is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
a fool or simpleton; ninny.
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