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
The Eye’s Adaptation to Color As one works with color in a practical or experimental way; one is impressed by two apparently
The Eye’s Adaptation to Color As one works with color in a practical or experimental way; one is impressed by two apparently
admin
2013-12-28
64
问题
The Eye’s Adaptation to Color
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 Schouten, 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 next result is that, if the eye is so exposed and then the gaze is transferred to an area of lower intensities, 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.
The present selection has apparently been preceded by sortie explanation of______.
选项
A、some experiments with color pigments
B、the nature of color
C、the color properties of various surfaces
D、the mechanism of the eye’s adaptation to color
答案
D
解析
本题问这篇节选文章的前面很明显是解释什么的。根据第一段最后一句话,“…seem to be due…to the mechanism of color adaptation mentioned earlier.“……似乎在很大程度上是由于前面所提到的颜色适应机制”。
转载请注明原文地址:https://kaotiyun.com/show/5GQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
FriendlyRelationswiththePeopleAround1Youdependonallthepeoplecloselyaroundtogiveyouthewarmfeelingofbelongin
LoweringtheRiskofHeartDiseaseLikemillionsofotherAmericans,Icomefromafamilywithahistoryofheartdisease.My
Intherecentpast,medicalresearchershaveshownthatheartdiseaseisassociatedwithcertainfactorsinourday-to-daylives
Intherecentpast,medicalresearchershaveshownthatheartdiseaseisassociatedwithcertainfactorsinourday-to-daylives
Throughouttheworldthereisashortageofhumanorgansfortransplants.InBritain,forexample,6000peoplearewaitingforo
Apparentlyininterviewsherefusestotalkabouthisprivatelife.
AdaptationofLivingThingsCertainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbe
Iamverygratefultoyouforyourassistance.
SaveEnergyatHomeOntheaverage,Americanswasteasmuchenergyastwo-thirdsoftheworld’spopulationconsumes.That’s
Hewaspersuadedtogiveuptheidea.
随机试题
下列关于著作权资产评估的说法中,错误的是()。
数据库系统中除了可用层次模型和关系模型表示实体类型及实体间联系的数据模型以外,还有()。
A、15%B、20%C、40%D、60%正常人体细胞外液约占体重的
下列小儿用药注意事项中不正确的是
A.生后4~6dB.生后3个月C.生后4~6岁D.7岁E.8岁小儿白细胞数目接近成人水平的年龄()。
建筑工地上用以拌制混合砂浆的石灰膏必须经过一定时间的陈化,这是为了消除以下哪项的不利影响:
甲容器中有纯酒精11升,乙容器中有水15升,第一次将甲容器中的一部分纯酒精倒入乙容器,使酒精和水混合;第二次将乙容器中的一部分混合液倒入甲容器,这样甲容器中纯酒精含量为62.5%,乙容器中纯酒精含量为25%。那么第二次从乙容器倒入甲容器的混合液是多少升?
与有线网络相比较,卫星通信的一个主要的缺点是——。
EnthusiasmforPetsPetsarean【T1】__________partofmanyBritishfamilies.Catsanddogsarethemost【T2】__________pets
A、Inanoffice.B、Inarestaurant.C、Atarailwaystation.D、Attheinformationdesk.B
最新回复
(
0
)