half-wave plate

[ haf-weyv, hahf- ]

/ ˈhæfˌweɪv, ˈhɑf- /

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noun Optics.

a crystal thin enough to cause a phase difference of 180° between the ordinary and extraordinary rays of polarized light, thereby changing the direction of the plane of polarization.

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Compare quarter-wave plate.

Origin of half-wave plate

First recorded in1900–05

Words nearby half-wave plate

half-turn, half-turning, half twist, half-used, half volley, half-wave plate, half-wave rectifier, halfway, halfway house, half Wellington, half-wit

How to use half-wave plate in a sentence

Eric Garcetti succeeded Villaraigosa and has received high marks in his first year and a half on the job.
The Golden State Preps for the ‘Red Wedding’ of Senate Races|David Freedlander|January 9, 2015|DAILY BEAST
My dad was a sailor, and all through my childhood he was away half of the time at sea, and to an extent I have a similar job.
Belle & Sebastian Aren’t So Shy Anymore|James Joiner|January 7, 2015|DAILY BEAST
As a result, training squadrons—called Formal Training Units (FTU)—are being staffed with less than half the people they need.
Exclusive: U.S. Drone Fleet at ‘Breaking Point,’ Air Force Says|Dave Majumdar|January 5, 2015|DAILY BEAST
Travel Noire fellows earned about a half million travel miles in 2014.
‘We Out Here’: Inside the New Black Travel Movement|Charlise Ferguson|January 4, 2015|DAILY BEAST

Murders in the City of Angels have fallen by about half in the last 10 years: no small feat for such a big city.
America’s 2014 Murder Capital|Brandy Zadrozny|January 3, 2015|DAILY BEAST
It is the principal waste-product of metabolism, and constitutes about one-half of all the solids excreted—about 30 gm.
A Manual of Clinical Diagnosis|James Campbell Todd
A small book, bound in full purple calf, lay half hidden in a nest of fine tissue paper on the dressing-table.
Hilda Lessways|Arnold Bennett
Hilda, trembling at the door, more than half expected Mr. Orgreave to say: "You mean, she's invited herself."
Hilda Lessways|Arnold Bennett
All changes are to be Rang either by walking them (as the term is) or else Whole-pulls, or Half-pulls.
Tintinnalogia, or, the Art of Ringing|Richard Duckworth and Fabian Stedman
The Vine is a universal favorite, and rarely out of view; while it often seems to cover half the ground in sight.
Glances at Europe|Horace Greeley