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
38
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
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesamelife【C1】______commontoallanimals.Inabiologica
Mr.Abu,thelaboratoryattendant,cameinfromtheadjoiningstoreandbrisklycleanedtheblackboard.HewasaretiredAfrican
InMicrosoft’slatestattempttoreachouttobloggers,thecompanyrecentlygaveawayexpensivelaptopsloaded【C1】______itsnew
Bethworkedhardto______inwiththelocalsduringhervisit.
Americansocietyisnotnap(午睡)friendly.Infact,saysDavidDinges,asleepspecialistattheUniversityofPennsylvaniaSchool
AustraliabegantoassumeitsmodernconfigurationbytheEoceneEpoch,some50millionyearsago,whenAntarcticabrokeawayan
Ayearagothefirmhada______lossof4.3milliondollarsor20centsashareafterallnecessarydeduction.
IndustrialproductionmanagerscoordinatetheresourcesandactivitiesrequiredtoproducemillionsofgoodseveryyearintheU
Althoughmostdreamsapparentlyhappen______,dreamactivitymaybeprovokedbyexternalinfluences.(2013年北京航空大学考博试题)
WhentheAconcentrationofcalciuminthebloodisBtoolow,theparathyroidglandsCbegantoDsecretethehormoneparathormone.
随机试题
下图中的内容是一份外部商务沟通文件。根据所示文件的内容,简述这种类型的商务沟通文件主要包括哪些内容?
使用化学消毒剂注意事项有()
A.5~6岁B.10岁左右C.12岁左右D.14岁左右E.18~20岁机体第一次生长发育高峰期结束的年龄是
A、鼠疫杆菌B、炭疽杆菌C、布氏杆菌D、钩端螺旋体E、普氏立克次体传播媒介是鼠蚤
试回答轮廓标工程质量检验评定标准的相关问题。反射器中心高度的允许误差和抽查频率为()。
阳台两侧扶手的端部必须与外墙受力构件用铁件牢固连接,其作用是下列哪一项?[2001年第117题]
当基金的净值过高时,通过()可以降低其净值。
设由曲线y=e—x(x≥0),x轴,y轴和直线x=ξ(ξ>0)所围平面图形绕x轴旋转一周所得立体图形的体积为V(ξ),求使V(a)=V(ξ)的a.
[*]
Dogsaresocialanimalsandwithoutpropertraining,theywillbehaveaswildanimals.Theywillsoilyourhouses,【M1】_
最新回复
(
0
)