WordNet

mark with lines; "sorrow had lined his face"
a length (straight or curved) without breadth or thickness; the trace of a moving point
a single frequency (or very narrow band) of radiation in a spectrum
reinforce with fabric; "lined books are more enduring"
a particular kind of product or merchandise; "a nice line of shoes" (同)product line, line of products, line of merchandise, business line, line of business
the road consisting of railroad track and roadbed (同)railway line, rail line
a commercial organization serving as a common carrier
acting in conformity; "in line with"; "he got out of line"; "toe the line"
something (as a cord or rope) that is long and thin and flexible; "a washing line"
a conceptual separation or distinction; "there is a narrow line between sanity and insanity" (同)dividing_line, demarcation, contrast
a formation of people or things one behind another; "the line stretched clear around the corner"; "you must wait in a long line at the checkout counter"
a formation of people or things one beside another; "the line of soldiers advanced with their bayonets fixed"; "they were arrayed in line of battle"; "the cast stood in line for the curtain call"
a fortified position (especially one marking the most forward position of troops); "they attacked the enemys line"
a mark that is long relative to its width; "He drew a line on the chart"
a spatial location defined by a real or imaginary unidimensional extent
in games or sports; a mark indicating positions or bounds of the playing area
persuasive but insincere talk that is usually intended to deceive or impress; "`let me show you my etchings is a rather worn line"; "he has a smooth line but I didnt fall for it"; "that salesman must have practiced his fast line of talk"
text consisting of a row of words written across a page or computer screen; "the letter consisted of three short lines"; "there are six lines in every stanza"
be in line with; form a line along; "trees line the riverbank" (同)run along
cover the interior of; "line the gloves"; "line a chimney"
fill plentifully; "line ones pockets"
measured lengthwise; "cost of lumber per running foot" (同)running
designating or involving an equation whose terms are of the first degree (同)additive
(of a leaf shape) long and narrow (同)elongate
of or in or along or relating to a line; involving a single dimension; "a linear measurement" (同)one-dimensional
the condition of having or giving polarity (同)polarisation
the phenomenon in which waves of light or other radiation are restricted in direction of vibration (同)polarisation

PrepTutorEJDIC

『線』,筋,けい / (色・縫い目などの)『線』,しま;(顔・手などの)しわ(wrinkle) / (物・人の)『列』,行列(row) / 『綱』,糸,針金 / 電線,電話線,電信線 / (文章の)『行』;(詩の)『行』 / 《しばしばa~》《話》『短い手紙』(note) / 《複数形で》輪郭,外形(outline) / 境界線(boundary);限界,限度(limit) / (鉄道・バスなどの)路線;航路,空路 / 《複数形で》せりふ / 進路,道順(course);(考えなどの)筋道,方針 / 《しばしばone's~》(活動の)分野,方面;特意 / 家系,血統,血筋 / 在庫商品,仕入れ品 / 導管,パイプライン / 《しばしば複数形で》戦線,防御線 / …‘に'『線を引く』,筋(しま,しわ)をつける / …‘に'『沿って並ぶ;』(…を)…‘に'沿って並べる《+『名』+『with』+『名』》
(材料で)〈着物など〉‘に'裏を付ける《+『名』『with』+『名』》 / (…で)…‘を'満たす,(…を)…‘に'詰め込む《+『名』+『with』+『名』》
線の,直線の / 線から成る,線を使った;線状の / (方程式が)一次の

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/05/08 13:14:34」(JST)

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Diagram of the electric field of a light wave (blue), linear-polarized along a plane (purple line), and consisting of two orthogonal, in-phase components (red and green waves)

In electrodynamics, linear polarization or plane polarization of electromagnetic radiation is a confinement of the electric field vector or magnetic field vector to a given plane along the direction of propagation. See polarization for more information.

The orientation of a linearly polarized electromagnetic wave is defined by the direction of the electric field vector.^[1] For example, if the electric field vector is vertical (alternately up and down as the wave travels) the radiation is said to be vertically polarized.

Mathematical description of linear polarization

The classical sinusoidal plane wave solution of the electromagnetic wave equation for the electric and magnetic fields is (cgs units)

for the magnetic field, where k is the wavenumber,

is the angular frequency of the wave, and is the speed of light.

Here

is the amplitude of the field and

is the Jones vector in the x-y plane.

The wave is linearly polarized when the phase angles are equal,

.

This represents a wave polarized at an angle with respect to the x axis. In that case the Jones vector can be written

.

The state vectors for linear polarization in x or y are special cases of this state vector.

If unit vectors are defined such that

and

then the polarization state can written in the "x-y basis" as

.

References

Jackson, John D. (1998). Classical Electrodynamics (3rd ed.). Wiley. ISBN 0-471-30932-X.

^ Shapira, Joseph; Shmuel Y. Miller (2007). CDMA radio with repeaters. Springer. p. 73. ISBN 0-387-26329-2. Cite uses deprecated parameters (help)

External links

Animation of Linear Polarization (on YouTube)
Comparison of Linear Polarization with Circular and Elliptical Polarizations (YouTube Animation)

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