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
2016-01-30
43
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.
The present selection has apparently been preceded by some 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 eye’s adaptation to color
答案
D
解析
细节推断题。根据原文首段尾句中的the mechanism of color adaptation mentioned earlier与选项D对应,当前的选择显然一直以眼睛适应颜色的机能原理为前提。故答案为D。
转载请注明原文地址:https://jikaoti.com/ti/a5yYFFFM
0
考博英语
相关试题推荐
ThemoodofcomplacencyintheEuropeanUnion(EU)isdrivenlargelybytherecoveryinFranceandGermanyandtheimminentlaun
ThemoodofcomplacencyintheEuropeanUnion(EU)isdrivenlargelybytherecoveryinFranceandGermanyandtheimminentlaun
Nanotechnology,accordingtoitsfans,willjump-startanewindustrialrevolutionwithmolecular-sizedstructuresascomplexas
TheeventsofSept.11haveratchetedupsecurityatAmericanairportstothehighestlevelever,accordingtoaspokesmanforT
TheeventsofSept.11haveratchetedupsecurityatAmericanairportstothehighestlevelever,accordingtoaspokesmanforT
"RefrigeratorproductioninChinajumpedfrom1.4millionunitsin1985to10.6millionin1998,"accordingtoDavidFridley,ar
Byfarthemostcommondifficultyinstudyissimplefailuretogetdowntoregularconcentratedwork.Thisdifficultyismuchg
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
随机试题
同经丸的功用是()(2006年第49题)
患者女,58岁,咽干、咽痒,异物感20余年,伴恶心、干呕,经常反复发作咽痛。检查:咽黏膜慢性充血、扁桃体工度肿大,表面可见瘢痕,挤压腭舌弓,隐窝口可见黄色物溢出,最可能的诊断为
现有95%乙醇250ml,要配制70%乙醇,需加入蒸馏水:
根据增值税法律制度的规定,增值税一般纳税人提供的下列服务中,适用6%税率的是()。
知觉过程中以过去经验来对知觉对象做出某种解释,使其具有某种意义的特性被称为()。
计算机应用广泛,而其应用最广泛的领域是()。
阅读以下说明,回答问题1~5。说明:利用VLAN技术可以把物理上连接的网络从逻辑上划分为多个不同的虚拟子网,可以对各个子网实施不同的管理策略。图13-4表示两个交换机相连,把6台计算机配置成两个VLAN。1.双绞线可以制作成直连线和交叉线两种形式,在
数据访问页的“主题”是指()。
Imagineeatingeverythingdeliciousyouwantwithnoneofthefat.Thatwouldbegreat,wouldn’tit?New"fakefat"products
Hedidn’tfearnewideas,______thefuture.
最新回复
(
0
)