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
2015-04-24
71
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 the 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 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" super imposed 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 — such as a lawn or shrub in shadow — we can expect______.
选项
A、a time lag in the focusing ability of the eye
B、the immediate loss of the "afterimage" of the first object
C、some inability to see colors of the latter-named objects until loss of sensitivity has been regained
D、adaptation in the central area of the eye but little adaptation in the lateral areas to the new intensity level
答案
C
解析
细节推断题。根据题干关键词eye has been looking at an object in bright sunlight定位到原文尾段第五句。原句中的still be present and appear as an“afterimage”super imposed on the second与选项C对应。故答案为C。
转载请注明原文地址:https://kaotiyun.com/show/LjLO777K
0
考博英语
相关试题推荐
Howcloseparentsaretotheirchildren______astronginfluenceonthecharacteroftheirchildren.
Mymothercan’tget______becauseshehasrheumatism(风湿病).
Americanwomenexperienceagreat【1】oflifestyles.A"typical"Americanwomanmaybesingle.Shemayalsobedivorcedormarried
Americanwomenexperienceagreat【1】oflifestyles.A"typical"Americanwomanmaybesingle.Shemayalsobedivorcedormarried
Writeanessayentitled,OnUnrestrainedConsumptionaccordingtothefollowingoutlineinnolessthan250words.Youshouldwr
Malnutritionduringweaningage—whenbreastmilkisbeingreplacedbysemi-solidfoods—ishighlyprevalentinchildrenofpoorh
Sciencealwayspaysattentiontopracticality.Itinvolvestheconscientiousquestfortruthandpermitsofnodeceit;what’smor
Ofthegreatvarietyofopinionsconcerning"marriageformoney",thefollowingthreeareimportantwithreferencetothedevelopm
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
随机试题
焊接时产生的弧光是由紫外线和红外线组成的。()
女性,30岁,因发热,体温达39.3℃伴咳嗽,痰中带血3天来诊。病前未看过医生。WBC13.5x109/L。病人最可能的诊断是
有关肺气肿的后果,下列哪种是错误的
治疗头痛、咽喉肿痛、小便不利,便秘,昏厥,小儿惊风等,可取治疗癃闭,遗尿,便秘,足跟痛,痴呆,可取
A.国务院药品监督管理部门制定B.国务院卫生行政部门制定C.国务院药品监督管理部门会同国务院卫生行政部门制定D.国务院药品监督管理部门会同国务院中医药管理部门制定E.国务院制定中药品种保护制度的具体办法由
()的颁布实施,标志着安全生产成为我国现阶段建筑业工作的重点,安全生产制度被确立为促进我国建筑业发展的一项根本制度。
根据《工程建设项目施工招标投标办法》(国家七部委局第30号令),下列属于招标人与投标人串通投标的行为包括()。
从银行所有者和管理者的角度讲,经济资本是用来承担非预期损失和保持正常经营所需的成本。()
与银行借款相比,下列各项中,不属于发行债券筹资特点的是()。
Thefoodsupplywillnotincreasenearlyenoughtomatchthis,whichmeansthatweareheadingintoacrisisinthematterofpr
最新回复
(
0
)