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
35
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
Ateacherissomeonewhocommunicatesinformationorskillsothatsomeoneelsemaylearn.Parentsarethe【C1】______teachers.Ju
Thecharacterarmorconsistsofdefensivecharactertraits,likearroganceorappre-hensiveness,thatdevelopedinchildhoodto_
It’sallannualback-to-schoolroutine.Onemorningyouwavegoodbye,andthat【C1】______eveningyou’reburningthelate-nightoi
It’sallannualback-to-schoolroutine.Onemorningyouwavegoodbye,andthat【C1】______eveningyou’reburningthelate-nightoi
ManycountrieswillnotallowcigaretteadvertisingintheirnewspapersoronTVespeciallysincetheadvertisementsareusually
Thesinglegreatestshiftinthehistoryofmass-communicationtechnologyoccurredinthe15thcenturyandwaswelldescribedby
Americansocietyisnotnap(午睡)friendly.Infact,saysDavidDinges,asleepspecialistattheUniversityofPennsylvaniaSchool
Graphenemustsurelybeoneofthemostexcitingdevelopmentsinmodernscience.Indeed,thesubstanceissoextraordinarythat
Thoughnotbiologicallyrelated,friendsareas"related"asfourthcousins,sharingabout1%ofgenes.Thatis【C1】______astudy
随机试题
关系数据库标准语言SQL,的查询语句的一种形式为“SELECT、A1,A2,…,AnFROMR1,R2,…,RmWHEREF”,其中,SELECT、和WHERE子句可以分别实现关系代数中的_______。
Thelawyeradvisedhimtodropthe______,sincehestandslittlechancetowin.
肝脏活体组织穿刺术的禁忌证有哪些?
A.对氨基苯甲酸B.对氨基酚C.对苯二酚D.游离肼E.游离水杨酸药典规定异烟肼应检查的杂质是
下列指标中,属于财务绩效定量评价中评价企业资产质量状况的有()。
【2016年湖北】根据我国未成年人保护法的规定,保护未成年人的工作,应当遵循下列哪些原则?()
某女婴,出生7个月,2008年10月7日因发烧去甲市医院门诊部治疗。医生周某问明病情后即开处方,并为婴儿臀部肌肉注射一针,药品名不详。婴儿回家后持续发烧多日,此间曾经他人注射治疗,并在婴儿臀部留下四个针眼,但婴儿高烧仍不退。2008年10月8日下午入住乙
经过历史长河的大浪淘沙,我国“选出”了许多“圣人”,除至圣孔子和亚圣(51)以外,最负盛名的还有书圣(52)、诗圣(53)、画圣(54)、酒圣(55)、武圣(56)等。
以下关于简单加密支付系统模型中加密技术的叙述,正确的是(25)。
Themedianof21differentintegersis17.Whichofthefollowingistheleastpossibleoftherangeoftheseintegers?
最新回复
(
0
)