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
2013-01-29
44
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 of 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.
If a person’s eye has been looking at an object in bright sunlight for some time, and then shifts to an object not well lit, we can expect ______.
选项
A、a time lag in the focusing ability of the eye
B、some inability to see colors of the latter-named objects until loss of sensitivity has been regained.
C、the immediate loss of the "afterimage" of the first object
D、the adaptation in the central area of the eye but little adaptation in the lateral areas to the new intensity level.
答案
B
解析
本题中,A、C、D三项在文中未被提及。从最后一段可知,B项“直到失去的感觉恢复后才能看见东西”符合文意。因此B项为正确答案。
转载请注明原文地址:https://jikaoti.com/ti/csqYFFFM
0
考博英语
相关试题推荐
Inoursocietytherazorofnecessitycutsclose.Youmustmakeabucktosurvivetheday.Youmustworktomakeabuck:Thejob
Lovecan’tconquerall.So,beforecouplestietheknot,theyshouldknowwhatthey’regettinginto.Thetabooagainstcouplesl
ThehistoryofWesternmusicproperlybeginswiththemusicoftheChristian,Church.ButallthroughtheMiddleAgesandevent
Telephonessavethefeetandendlessamountsoftime.Thisisduepartlytothefactthatthetelephoneserviceissuperbhere,
Theenergycrisis,whichisbeingfeltaroundtheworld,hasdramatizedhowthecarelessuseoftheearth’sresourceshasbrought
TestsconductedattheUniversityofPennsylvania’sPsychologicalLaboratoryshowedthatangerisoneofthemostdifficultemot
Bigbusinessesenjoycertain______thatsmalleronesdonothave.
Therebelarmyisattemptingto______thegovernment.
Thefull______ofchangesincomputertechnologywillbefeltwithinthenextfewyears.
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffordtomakecostlyadvertisingmistakesiftheywantt
随机试题
A.苍术B.藿香C.佩兰D.白豆蔻E.草果用于治疗疟疾的药物是
患者男性,58岁。胸闷痛反复发作二年,加重一日,现胸闷如窒而痛,气短,喘憋,心烦易怒,咯黄痰,头昏沉,大便干,夜寐不安,舌暗红苔黄腻,脉滑数弦。
法律责任是一种不利的法律后果,而产生法律责任的原因之一是违法行为,关于违法行为的构成要素,以下论述正确的是:()
根据《大气污染防治行动计划》,到2017年,除必要保留的以外,地级及以上城市建成区基本淘汰每小时()及以下的燃煤锅炉,禁止新建每小时()以下的燃煤锅炉。
只有掌握了业主、设计单位、咨询单位和竞争对手的情况,承包商才能准确地报价,这说明( )也是影响建设工程投资的重要因素。
下列属于泄露客户信息的行为是()。
甲公司是一家国有煤矿企业,按照2013年1月1日开始实施的《中央企业负责人经营业绩考核暂行办法》对企业负责人实际经济增加值考核2016年的企业财务报表中有关资料如下:(1)平均资产合计为20000万元(其中,在建工程为3000万元,有80%符合主业规定)
根据测算,全国城乡普遍实施“单独二胎”政策,将使总人口在2030年达到14.53亿,峰值人口增加1500万;2050年,总人口下降为13.85亿,但比现行生育率增加约5000万人,“单独二胎”与现行生育政策相比,2030年老龄化水平从24.1%降到23.8
A、 B、 C、 D、 B
A、Learninghowtochangemajors.B、Decidingwhichprofessortofollow.C、Learninghowtomanagetime.D、Makingsurehowtolearn
最新回复
(
0
)