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
74
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
Ateacherissomeonewhocommunicatesinformationorskillsothatsomeoneelsemaylearn.Parentsarethe【C1】______teachers.Ju
Hedidn’tnoticemeinthecrowd;buthespottedmysisterwhowas______becauseofherredhair.
Engineeringstudentsaresupposedtobeexamplesofpracticalityandrationality,butwhenitcomestomycollegeeducation,Ia
Therearefourbasictypesofcompetitioninbusinessthatformacontinuumfrompurecompetitionthroughmonopolisticcompetiti
ChildrenareAamongthemostfrequentvictimsofviolent,Bdrug-relatedcrimesCthathavenothingDdoingwiththecostofacquir
Forgetfootball.Atmanyhighschools,thefiercestcompetitionisbetweenCokeandPepsioverexclusive"pouringrights"tosel
Hesaidthatveryclearlysothatnobodywasinany______aboutwhatwasmeant
InsomeAfricancountries,thecostoftreatinganAIDSpatientmay______hisorherentireannualincome.(2013年3月中国科学院考博试题)
Theagency,______tosetandenforcehealthstandardforAmericanworkers,hasbeenpromisingacottonduststandardforsevera
随机试题
简述社会主义核心价值体系的基本内容。
加碘预防地方性甲状腺肿是早期发现原位癌并加以手术是
A造纸厂与B科技开发公司之间的委托合同是否有效?为什么?本案应如何处理?为什么?
甲公司系一广告公司。在进行企业内部升级改造时。甲公司将淘汰掉的工作电脑以二手市场价出售给乙公司。但甲公司的经营范围内并无出售电脑一项业务,则甲、乙的买卖行为法律效力如何?()
建设工程进度控制的总目标是()。
适中的资产组合策略的特点是()。
材料:王老师是小学三年级的数学教师,在教授“同一平面上两点之间直线最短”时是这样教学的:他先在黑板上取了在同一平面上的两个点,并作出这两点间的四条线段,其中包括两点间的直线。接着,请一位学生把这几条线段的距离测量出来,写在线段旁,再让其他学生说出哪一条最
“十四五”时期是我国在全面建成小康社会基础上开启()社会主义现代化国家新征程的第一个五年,意义十分重大。
根据下列文字回答以下问题:日前,A市市场监管局发布内资企业半年度分析报告。2014年上半年,该市新设内资企业19674户,注册资本(金)1179.4亿元,同比分别增长37.7%和166%。其中私营企业:19167户,注册资本(金)104
Beijing:TheUnitedStatesandNorthKoreahadtheirfirst【C1】______infourmonthsherethisafternoonaspartofthe【C2】______
最新回复
(
0
)