首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is
As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is
admin
2020-03-30
50
问题
As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile changeable thing depending to a large extent on the relationship of the color to other colors seen simultaneously. It is not fixed in its relation to the direct stimulus which creates it. On the other hand, the properties pf surfaces that give rise to color do not seem to change greatly under a wide variety of illumination colors, usually(but not always)looking much the same in artificial light as in daylight. Both of these effects seem to be due in large part to the mechanism of color adaptation mentioned earlier.
When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This readjustment does not immediately affect the color seen but usually does affect the next area to which the gaze is shifted. The longer the time of viewing, the higher the intensity, and the larger the area, the greater the effect will be in terms of its persistence in the succeeding viewing situation. As indicated by the work of Wright and Shouted, it appears that, at least for a first approximation, full adaptation takes place over a very brief time if the adapting source is moderately bright and the eye has been in relative darkness just previously. As the stimulus is allowed to act, however, the effect becomes more persistent in the sense that it takes the eye longer to regain its sensitivity to lower intensities. The net result is that, if the eye is so exposed and then the gaze is transferred to an area of lower intensity, the loss of sensitivity produced by the first area will still be present and appear as an "afterimage" superimposed on the second. The effect not only is present over the actual area causing the "local adaptation" but also spreads with decreasing strength to adjoining areas of the eye to produce "lateral adaptation. " Also, because of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become uniform over the whole eye.
This selection is primarily concerned with______.
选项
A、the eye’s adaptation to color
B、the properties of colored surfaces
C、the color of colors
D、the effect of changes in color intensity
答案
A
解析
从文中的“Both of these effects seem to be due in large part to the mechanism of color adaptation mentioned earlier.”可知,A项“眼睛对色彩的适应性”符合文意。其他三项“B‘道具表面颜色’;C‘色彩本身’;D‘颜色突然转换的影响’”都不正确。
转载请注明原文地址:https://kaotiyun.com/show/R1TO777K
0
考博英语
相关试题推荐
Somereadersmayfindit______thatabookarguingforgreaterliteracyandintellectualdisciplineshouldleadtoacallforles
It’sallannualback-to-schoolroutine.Onemorningyouwavegoodbye,andthat【C1】______eveningyou’reburningthelate-nightoi
Engineeringstudentsaresupposedtobeexamplesofpracticalityandrationality,butwhenitcomestomycollegeeducation,Ia
Becauseofarecentobstacleinproduction,saleshavedroppedandaccordinglyprofitshave______.
Ifthedisputeisnotsettledina(n)______waysoon,thetwocountrieswillcertainlygotowar.
Currentdatasuggestthat,although______statesbetweenfearandaggressionexist,fearandaggressionareasdistinctphysiolo
CapitalAinflowswillalsoBtendtoincreasetheinternationalvalueofthedollar,CmakeitmoredifficulttosellU.S.Dexpor
Inhisview,thoughHongKonghasnodirectculturalidentity,localartisthrivingby"being______,"beingopentoallkindso
Alltheroomsonthesecondfloorhavenicely______carpets,whichareincludedinthepriceofthehouse.
ThecrucialyearsoftheDepression,astheyarebroughtintohistoricalfocus,increasinglyemergeasthedecisivedecadeforA
随机试题
某产妇,产后母乳喂养不顺利,改为人工喂养。产后一周左右产妇出现焦虑情绪,易激惹,有时暗自伤心落泪,伴有失眠、便秘等躯体症状。产后两周时,产妇的情绪越来越低落,回避他人,对自己缺乏信心,并因自己不会照顾小孩而有负罪感,有自杀念头。社区护士应提供的护理措施
A、HethinksBakeristoostrictinclass.B、HethinksBakerisnotstraightforward.C、Hethinkssheisunfair.D、Shedoesnotex
外科急腹症的特点,正确的是
当前城市规划管理工作的重要任务是()。
防水混凝土可通过调整配合比,或掺加外加剂、掺合料等措施配制而成,其抗渗等级不得小于(),其试配混凝土的抗渗等级应比设计要求提高()MPa。
导游的素质要求包括()。
幼儿园选择教育内容的依据是()。
《2016年政府工作报告》指出,改革是引领发展的第一动力,必须摆在国家发展全局的核心位置,深入实施创新驱动发展战略。()
Anewreportclaimsthatthemakersofsugar-laden(含糖)drinkssuchassodas,sportsdrinks,energydrinksandfruitdrinkstaked
A、TheterribleeffectsofdroughtonCalifornia.B、Newtechnologiesusedtopreventwaterwaste.C、Amandatoryorderonwatercu
最新回复
(
0
)