What's the difference between light and opacity?

Light


Definition:

  • (n.) That agent, force, or action in nature by the operation of which upon the organs of sight, objects are rendered visible or luminous.
  • (n.) That which furnishes, or is a source of, light, as the sun, a star, a candle, a lighthouse, etc.
  • (n.) The time during which the light of the sun is visible; day; especially, the dawn of day.
  • (n.) The brightness of the eye or eyes.
  • (n.) The medium through which light is admitted, as a window, or window pane; a skylight; in architecture, one of the compartments of a window made by a mullion or mullions.
  • (n.) Life; existence.
  • (n.) Open view; a visible state or condition; public observation; publicity.
  • (n.) The power of perception by vision.
  • (n.) That which illumines or makes clear to the mind; mental or spiritual illumination; enlightenment; knowledge; information.
  • (n.) Prosperity; happiness; joy; felicity.
  • (n.) The manner in which the light strikes upon a picture; that part of a picture which represents those objects upon which the light is supposed to fall; the more illuminated part of a landscape or other scene; -- opposed to shade. Cf. Chiaroscuro.
  • (n.) Appearance due to the particular facts and circumstances presented to view; point of view; as, to state things fairly and put them in the right light.
  • (n.) One who is conspicuous or noteworthy; a model or example; as, the lights of the age or of antiquity.
  • (n.) A firework made by filling a case with a substance which burns brilliantly with a white or colored flame; as, a Bengal light.
  • (superl) Having light; not dark or obscure; bright; clear; as, the apartment is light.
  • (superl) White or whitish; not intense or very marked; not of a deep shade; moderately colored; as, a light color; a light brown; a light complexion.
  • (n.) To set fire to; to cause to burn; to set burning; to ignite; to kindle; as, to light a candle or lamp; to light the gas; -- sometimes with up.
  • (n.) To give light to; to illuminate; to fill with light; to spread over with light; -- often with up.
  • (n.) To attend or conduct with a light; to show the way to by means of a light.
  • (v. i.) To become ignited; to take fire; as, the match will not light.
  • (v. i.) To be illuminated; to receive light; to brighten; -- with up; as, the room lights up very well.
  • (superl.) Having little, or comparatively little, weight; not tending to the center of gravity with force; not heavy.
  • (superl.) Not burdensome; easy to be lifted, borne, or carried by physical strength; as, a light burden, or load.
  • (superl.) Easy to be endured or performed; not severe; not difficult; as, a light affliction or task.
  • (superl.) Easy to be digested; not oppressive to the stomach; as, light food; also, containing little nutriment.
  • (superl.) Not heavily armed; armed with light weapons; as, light troops; a troop of light horse.
  • (superl.) Not encumbered; unembarrassed; clear of impediments; hence, active; nimble; swift.
  • (superl.) Not heavily burdened; not deeply laden; not sufficiently ballasted; as, the ship returned light.
  • (superl.) Slight; not important; as, a light error.
  • (superl.) Well leavened; not heavy; as, light bread.
  • (superl.) Not copious or heavy; not dense; not inconsiderable; as, a light rain; a light snow; light vapors.
  • (superl.) Not strong or violent; moderate; as, a light wind.
  • (superl.) Not pressing heavily or hard upon; hence, having an easy, graceful manner; delicate; as, a light touch; a light style of execution.
  • (superl.) Easy to admit influence; inconsiderate; easily influenced by trifling considerations; unsteady; unsettled; volatile; as, a light, vain person; a light mind.
  • (superl.) Indulging in, or inclined to, levity; wanting dignity or solemnity; trifling; gay; frivolous; airy; unsubstantial.
  • (superl.) Not quite sound or normal; somewhat impaired or deranged; dizzy; giddy.
  • (superl.) Easily bestowed; inconsiderately rendered.
  • (superl.) Wanton; unchaste; as, a woman of light character.
  • (superl.) Not of the legal, standard, or usual weight; clipped; diminished; as, light coin.
  • (superl.) Loose; sandy; easily pulverized; as, a light soil.
  • (adv.) Lightly; cheaply.
  • (v. t.) To lighten; to ease of a burden; to take off.
  • (v. i.) To dismount; to descend, as from a horse or carriage; to alight; -- with from, off, on, upon, at, in.
  • (v. i.) To feel light; to be made happy.
  • (v. i.) To descend from flight, and rest, perch, or settle, as a bird or insect.
  • (v. i.) To come down suddenly and forcibly; to fall; -- with on or upon.
  • (v. i.) To come by chance; to happen; -- with on or upon; formerly with into.

Example Sentences:

  • (1) On Friday night, in a stadium built in an area once deemed an urban wasteland, the flame that has journeyed from Athens to every corner of these islands will light the fire that launches the London Olympics of 2012.
  • (2) Apparently, the irradiation with visible light of a low intensity creates an additional proton gradient and thus stimulates a new replication and division cycle in the population of cells whose membranes do not have delta pH necessary for the initiation of these processes.
  • (3) Morphological alterations in the lungs of pheasants after prolonged high-dosage administration of bleomycin sulfate were studied by light and electron microscopy.
  • (4) Light microscopic studies of pancreata from mice sacrificed at this time demonstrated insulitis and beta cell necrosis.
  • (5) The dependence of fluorescence polarization of stained nerve fibres on the angle between the fibre axis and electrical vector of exciting light (azimuth characteristics) has been considered.
  • (6) A 66-year-old woman with acute idiopathic polyneuritis (Landry-Guillain-Barré [LGB] syndrome) had normal extraocular movements, but her pupils did not react to light or accommodation.
  • (7) We have examined overlapping octapeptides from the kappa IIIb light chain variable region and show that some framework peptides have the ability to bind aggregated IgG.
  • (8) This study examined both the effect of variations in optical fiber tip and in light wavelength on laser-induced hyperthermia in rat brain.
  • (9) The water is embossed with small waves and it has a chill glassiness which throws light back up at the sky.
  • (10) A new type of Escherichia coli mutant which shows increased sensitivity to methyl methane sulfonate but not to UV light or to gamma rays was isolated after mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine.
  • (11) Approximately 90% of the patients have a lambda light chain myeloma protein and almost all patients excrete Bence-Jones protein.
  • (12) Matthias Müller, VW’s chief executive, said: “In light of the wide range of challenges we are currently facing, we are satisfied overall with the start we have made to what will undoubtedly be a demanding fiscal year 2016.
  • (13) In addition, lightly immunostained cells were distinguished in the caudal portion of the hypothalamic arcuate nucleus, area of tuber cinereum, retrochiasmatic area, and rostral portion of the paraventricular thalamic nucleus after colchicine treatment.
  • (14) Photograph: Guardian The research also compiled data covered by a wider definition of tax haven, including onshore jurisdictions such as the US state of Delaware – accused by the Cayman islands of playing "faster and looser" even than offshore jurisdictions – and the Republic of Ireland, which has come under sustained pressure from other EU states to reform its own low-tax, light-tough, regulatory environment.
  • (15) Using an in vitro culture system, light scatter analyses, and two-color flow cytometry, we provide evidence that the interleukin-2 (IL-2) and transferrin receptors can be induced within 48 hr on nonproliferating immature thymocytes.
  • (16) Photoreactions induced in that proper sensitizer molecules absorb UV-light or visible light.
  • (17) Urine specimens from patient REE also contained a light chain fragment that lacked the first (amino-terminal) 85 residues of the native light chain but otherwise was identical in sequence to the light chain REE.
  • (18) Three coyotes were operantly conditioned to depress one of two foot treadles, left or right, depending on the condition of the stimulus light.
  • (19) These results are discussed in the light of the mode of action of the substances used.
  • (20) The birds were maintained at a constant temperature in, dim green light.

Opacity


Definition:

  • (n.) The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.
  • (n.) Obscurity; want of clearness.

Example Sentences:

  • (1) Only seven films (or 0.7 percent of the entire cohort) showed nodular or rounded opacities of the type typically seen in uncomplicated silicosis.
  • (2) The results showed that dogfish lenses developed superficial opacities due to near-UV exposure.
  • (3) We examined 84 eyes with different lens opacities, the visual acuity was analysed in relation to the axial, cortical and capsular cataract.
  • (4) Presence of aspecific lens opacities also did not correlate with the risk of having inherited the DM gene.
  • (5) The opacity changes resulting from storage in water can be reduced by increasing the polymerization time.
  • (6) Correlation with high-resolution computed tomography in two patients indicated that this opacity represented a sagittal orientation of the anterior minor fissure, with resultant inferomedial curving of the right upper lobe of the lung along the right border of the heart.
  • (7) Complications of trachoma (trichiasis and opacities) were common in this age group compared to those under 6 years of age.
  • (8) In conclusion, obliteration of the inner margin of the central vein and the opacity that decreased the radiolucency extending to the peripheral side of the upper lobe bronchus are strongly suggestive of interlobar lymph node enlargement.
  • (9) Experiences with surgical treatment of chronic endogenous uveitis in human patients have shown that vision-impairing axial opacities in the vitreous body can be removed by pars plana vitrectomy, and that a considerable decrease in the frequency and severity of uveitic relapses results.
  • (10) There is all sorts of opacity which makes it easy for an employee to suffer retaliation.” Despite recent reforms to improve transparency and accountability, the organisation remains impervious to public scrutiny, with no established mechanism for freedom of information – a right which more than 100 governments around the world have enshrined in law, and is openly advocated by UN bodies such as Unesco.
  • (11) These include fibrosis with or without consolidation (n = 12), ground-glass opacities (n = 7), widespread bilateral consolidation (n = 2), and bronchial wall thickening with areas of decreased attenuation (n = 2).
  • (12) Breaks responsible for rhegmatogenous retinal detachments in 78 eyes could not be seen preoperatively owing to opacities in the media, previous buckling or other causes.
  • (13) Opacities increased with increasing concentrations of NaLS from 5 X 10(-4) M to 5 X 10(-2) M, but at 5 X 10(-1) M all corneal preparations showed a decrease in opacity.
  • (14) In an increasingly digital society, the justification for opacity in trade negotiations has met its demise, and it's time that we see modern legal instruments negotiated in a transparent and inclusive manner in order to get the best outcome for our country.
  • (15) However, liver function tests and eye examinations for possible lens opacities are advised, and further long term studies in larger groups of patients are necessary before the side effect profile of lovastatin will be clearly established.
  • (16) Electron microscopy of L1210 cells exposed a short time (90 min) to 0.21-21 microM DHAQ reveals segregation of nucleoli; the segregated granular portion shows increased electron opacity.
  • (17) Lenticular lesions were present in all but two of the 18 patients with detailed ocular examination, whereas corneal opacities were found more often in type II than type I disease.
  • (18) Each control animal also developed a local lens opacity at the site of the capsular tear, as did half the animals treated with the discrete pattern.
  • (19) A critical discussion of the different opinions on the significance of histological findings in relation to pulp tolerance is presented, and finally the significance of water uptake and radiological opacity is discussed.
  • (20) Concomitantly there were opacities seen on chest X-rays.