bright linen.

Brit.

/ˌbrʌɪt ˈlʌɪn/, U.S.

/ˌbraɪt ˈlaɪn/

Origin: Formed within English, by compounding. Etymons: bright adj., line n.²

Etymology: < bright adj. + line n.² With sense 1 compare dark line n. at dark adj. Compounds 2.

1. Physics and Astronomy. A line of relative brightness in the spectrum of electromagnetic radiation coming from a given source, due to the presence of a particular element or molecule in the source; = emission line n. at emission n. Additions.In early use not a fixed collocation.Frequently compared and contrasted with dark lines, which are due to the absorption of electromagnetic radiation by a substance; cf. dark line n. at dark adj. Compounds 2, absorption line n. at absorption n. Compounds 2.

ΚΠ

1802 W. H. Wollaston in Philos. Trans. (Royal Soc.) 92 380 The spectrum..may be seen divided into 5 images, at a distance from each other. The 1st is broad red, terminated by a bright line of yellow.

1879 Trans. Royal Irish Acad.: Sci. 26 313 The bright of the yellow agreed with the bright line of Orion near D, and would seem to be the usual bright line of the chromosphere.

1987 Times (Nexis) 4 July The spectrum of Arakelian 120 has bright lines of many elements visible within it, including hydrogen and iron.

2004 M. Bartusiak Arch. Universe (2006) xxiv. 212 The dark Fraunhofer D lines, a distinctive double in the solar spectrum, precisely matched two bright lines emitted by the element sodium.

2. Chiefly U.S. A clear distinction or boundary. Frequently in to draw a bright line and variants. Often used in legal contexts; cf. Compounds 2.

ΘΚΠ

the world > relative properties > relationship > difference > [noun] > a difference or distinction

shedc950

diversityc1340

differencea1382

differencea1393

severance1422

distinction1435

discretivec1487

differing1528

unlikeness1561

distinguishment1592

fork1639

discrimen1644

misresemblancea1693

bright line1842

1842 Provinc. Med. & Surg. Jrnl. 8 Jan. 302/2 I should therefore hope, that the practitioner..will forbear violating that bright line of demarcation which separates us from the mercenaries of the world.

1894 E. Wambaugh Stud. Cases (ed. 2) ix. 102 At present it is difficult, perhaps impossible, to draw a bright line dividing local questions from general questions.

1999 G. Baumann Multicultural Riddle ix. 118 Where there is no bright line between two outdated extremes, there usually gapes a gray border zone patrolled by the culture police.

2018 Columbia Law Rev. 118 1433 The Act..apportioned jurisdiction among the state and federal governments by drawing a ‘bright line’ between wholesale and retail electricity sales.

Compounds

As a modifier.

C1.

a. In spectroscopy: designating a spectrum of electromagnetic radiation consisting of or characterized by the presence of emission lines rather than absorption lines. Cf. emission spectrum n. at emission n. Compounds.See note at sense 1.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > chromatism > [adjective] > of or relating to the spectrum

spectral1832

bright line1868

1868 Proc. Royal Soc. 1867–8 16 452 Not seen in spectroscope... It is almost impossible that this [nebula] can have a bright line spectrum, or it must have been seen.

1930 G. Thomson Atom ii. 22 A black line spectrum is called an ‘absorption’ spectrum, in contrast to the bright line ‘emission’ spectrum.

2011 M. Hein et al. Found. College Chem. in Lab. (ed. 13) 141 Use the hand-held spectroscope to examine the bright line spectrum of a fluorescent light.

b. Astronomy. Designating a celestial object that has an observable spectrum (primarily) consisting of, or characterized by the presence of, emission lines rather than absorption lines. Now rare.

ΚΠ

1881 Ann. Rep. Pres. & Treasurer Harvard Coll. 1880–1 112 The bright-line stars in Cygnus and in Sagittarius also give the line 467.

1919 Calif. Alumni Fortn. 4 Oct. 286/1 The spectrographic velocities of the bright-line nebulae in the [Magellanic] Clouds have been measured by the University's Observatory at Santiago, Chile.

1971 Isis 62 312 The number [of observations] had been enhanced by concentrating efforts on bright-line objects and almost totally ignoring spiral nebulae.

C2. U.S. Chiefly Law. Consisting of, relating to, or involving a clear, objective, or statutory distinction, as bright line rule, bright line test, etc. Cf. sense 2.The term is not used in English law despite the wording of quot. 1923.

ΚΠ

1923 Calif. Law Rev. 11 201 The English ‘bright line’ theory..draws a distinction between..acts producing a material injury to property and..acts producing personal discomfort.

1990 Old Colony Memorial (Plymouth, Mass.) 16 Aug. b11/3 The one-year requirement is a guideline and not a bright line test.

2006 N.Y. Times (National ed.) 23 Apr. ix. 2/3 ‘No underwear,’ she said. ‘No. No. No. That's a bright-line rule, as lawyers say.’

C3. Photography. Designating a viewfinder in which the area of the picture appears framed by a bright white line; also designating the bright frame in such a viewfinder. Now somewhat rare.

ΘΚΠ

society > leisure > the arts > visual arts > photography > camera > parts and accessories of camera > [adjective] > view-finders

brilliant1894

bright line1954

1954 R. H. Bomback Basic Leica Technique iii. 39 The most compelling new feature of the Leica M.3 is..the Measuring Bright Line Viewfinder.

1997 Photon Apr. 12/1 Its [sc. the rangefinder's] image appears in the centre of the brightline frames, the clarity of frames and image ensuring accurate framing and focusing even in the poorest light.

This entry has been updated (OED Third Edition, December 2019; most recently modified version published online December 2021).

单词	bright line
释义	bright linen. Brit. /ˌbrʌɪt ˈlʌɪn/, U.S. /ˌbraɪt ˈlaɪn/ Origin: Formed within English, by compounding. Etymons: bright adj., line n.² Etymology: < bright adj. + line n.² With sense 1 compare dark line n. at dark adj. Compounds 2. 1. Physics and Astronomy. A line of relative brightness in the spectrum of electromagnetic radiation coming from a given source, due to the presence of a particular element or molecule in the source; = emission line n. at emission n. Additions.In early use not a fixed collocation.Frequently compared and contrasted with dark lines, which are due to the absorption of electromagnetic radiation by a substance; cf. dark line n. at dark adj. Compounds 2, absorption line n. at absorption n. Compounds 2. ΚΠ 1802 W. H. Wollaston in Philos. Trans. (Royal Soc.) 92 380 The spectrum..may be seen divided into 5 images, at a distance from each other. The 1st is broad red, terminated by a bright line of yellow. 1879 Trans. Royal Irish Acad.: Sci. 26 313 The bright of the yellow agreed with the bright line of Orion near D, and would seem to be the usual bright line of the chromosphere. 1987 Times (Nexis) 4 July The spectrum of Arakelian 120 has bright lines of many elements visible within it, including hydrogen and iron. 2004 M. Bartusiak Arch. Universe (2006) xxiv. 212 The dark Fraunhofer D lines, a distinctive double in the solar spectrum, precisely matched two bright lines emitted by the element sodium. 2. Chiefly U.S. A clear distinction or boundary. Frequently in to draw a bright line and variants. Often used in legal contexts; cf. Compounds 2. ΘΚΠ the world > relative properties > relationship > difference > [noun] > a difference or distinction shedc950 diversityc1340 differencea1382 differencea1393 severance1422 distinction1435 discretivec1487 differing1528 unlikeness1561 distinguishment1592 fork1639 discrimen1644 misresemblancea1693 bright line1842 1842 Provinc. Med. & Surg. Jrnl. 8 Jan. 302/2 I should therefore hope, that the practitioner..will forbear violating that bright line of demarcation which separates us from the mercenaries of the world. 1894 E. Wambaugh Stud. Cases (ed. 2) ix. 102 At present it is difficult, perhaps impossible, to draw a bright line dividing local questions from general questions. 1999 G. Baumann Multicultural Riddle ix. 118 Where there is no bright line between two outdated extremes, there usually gapes a gray border zone patrolled by the culture police. 2018 Columbia Law Rev. 118 1433 The Act..apportioned jurisdiction among the state and federal governments by drawing a ‘bright line’ between wholesale and retail electricity sales. Compounds As a modifier. C1. a. In spectroscopy: designating a spectrum of electromagnetic radiation consisting of or characterized by the presence of emission lines rather than absorption lines. Cf. emission spectrum n. at emission n. Compounds.See note at sense 1. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [adjective] > of or relating to the spectrum spectral1832 bright line1868 1868 Proc. Royal Soc. 1867–8 16 452 Not seen in spectroscope... It is almost impossible that this [nebula] can have a bright line spectrum, or it must have been seen. 1930 G. Thomson Atom ii. 22 A black line spectrum is called an ‘absorption’ spectrum, in contrast to the bright line ‘emission’ spectrum. 2011 M. Hein et al. Found. College Chem. in Lab. (ed. 13) 141 Use the hand-held spectroscope to examine the bright line spectrum of a fluorescent light. b. Astronomy. Designating a celestial object that has an observable spectrum (primarily) consisting of, or characterized by the presence of, emission lines rather than absorption lines. Now rare. ΚΠ 1881 Ann. Rep. Pres. & Treasurer Harvard Coll. 1880–1 112 The bright-line stars in Cygnus and in Sagittarius also give the line 467. 1919 Calif. Alumni Fortn. 4 Oct. 286/1 The spectrographic velocities of the bright-line nebulae in the [Magellanic] Clouds have been measured by the University's Observatory at Santiago, Chile. 1971 Isis 62 312 The number [of observations] had been enhanced by concentrating efforts on bright-line objects and almost totally ignoring spiral nebulae. C2. U.S. Chiefly Law. Consisting of, relating to, or involving a clear, objective, or statutory distinction, as bright line rule, bright line test, etc. Cf. sense 2.The term is not used in English law despite the wording of quot. 1923. ΚΠ 1923 Calif. Law Rev. 11 201 The English ‘bright line’ theory..draws a distinction between..acts producing a material injury to property and..acts producing personal discomfort. 1990 Old Colony Memorial (Plymouth, Mass.) 16 Aug. b11/3 The one-year requirement is a guideline and not a bright line test. 2006 N.Y. Times (National ed.) 23 Apr. ix. 2/3 ‘No underwear,’ she said. ‘No. No. No. That's a bright-line rule, as lawyers say.’ C3. Photography. Designating a viewfinder in which the area of the picture appears framed by a bright white line; also designating the bright frame in such a viewfinder. Now somewhat rare. ΘΚΠ society > leisure > the arts > visual arts > photography > camera > parts and accessories of camera > [adjective] > view-finders brilliant1894 bright line1954 1954 R. H. Bomback Basic Leica Technique iii. 39 The most compelling new feature of the Leica M.3 is..the Measuring Bright Line Viewfinder. 1997 Photon Apr. 12/1 Its [sc. the rangefinder's] image appears in the centre of the brightline frames, the clarity of frames and image ensuring accurate framing and focusing even in the poorest light. This entry has been updated (OED Third Edition, December 2019; most recently modified version published online December 2021). < n.1802
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