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
Ways to Create Colors in a Photograph There are two ways to create colors in a photograph. One method called additive, start
Ways to Create Colors in a Photograph There are two ways to create colors in a photograph. One method called additive, start
admin
2011-01-05
73
问题
Ways to Create Colors in a Photograph
There are two ways to create colors in a photograph. One method called additive, starts with three basic colors and adds them together to produce some other color. The second method called subtractive, starts with white light(a mixture of all colors in the spectrum(光谱))and by taking away some or all other colors, leaves the one desired.
In the additive method, separate colored lights combine to produce various other colors. The three additive primary colors are green, red and blue (each providing about one-third of the wavelengths in the total spectrum). Mixed in varying proportions, they can produce all colors. Green and red light mix to produce yellow, red and blue light mix to produce magenta (a purplish pink) ; green and blue mix to produce cyan (a bluish green). When equal parts of all three of these primary-colored beams of light overlap(重叠), the mixture appears white to the eye.
In the subtractive process colors are produced when dye(染料) absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan, magenta and yellow; these primaries or dyes absorb red, green and blue wavelengths respectively, thus subtracting them from white light. These dye colors are the complementary colors to the three additive primaries of red, green and blue. Properly combined, the subtractive primaries can absorb all colors of light, producing black. But, mixed in varying proportions, they also can produce any color in the spectrum.
Whether 3 particular colors is obtained by adding colored lights together or by subtracting some light from the total spectrum, the result looks the same to the eye. The additive process was employed for early color photography. But the subtractive method, while requiring complex chemical techniques, has turned out to be more practical and is the basis of all modern color films.
What explanation is given for the use of the subtractive method in modern color films?
选项
A、The additive process is still being developed.
B、The subtractive process is more efficient.
C、Subtractive colors are more realistic.
D、Additive chemical techniques are too complex.
答案
B
解析
根据最后一段可知,通过加色法和减色法所获的颜色用肉眼来看效果是一样的。加色法用于早期彩色照片的处理,而减色法虽然需要复杂的化学工艺,却被证实是更为实用的方法,所以它成为了现代彩色胶卷的基础。由此可知相对于加色法,减色法更为有效、实用。
转载请注明原文地址:https://kaotiyun.com/show/9nQd777K
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
TheDangersofSecondhandSmokeMostpeopleknowthatcigarettesmokingisharmfultotheirhealth.Scientificresearchshow
BillGates:UnleashingYourCreativityI’vealwaysbeenanoptimistandIsupposethatisrootedinmybeliefthatthepower
StepBackinTimeDoyouknowthatwelivealotlongernowthanthepeoplewhowerebornbeforeus?Onehundredyearsagot
Intelligence:aChangedView1Intelligencewasbelievedtobeafixedentity,somefacultyofthemindthatweallpossessandw
Thecriminalgaveusalongchasebeforewecaughthim.
AinthedevelopmentofairtransportationBtheearliestpassengerflightsweresuccessfullyoperatedCtomaketraveleasyand
ReinventingtheTableAnearthscientisthasrejiggedtheperiodictabletomakechemistrysimplertoteachtostudents.(46)But
Thetruthisthathehasjustbeenfired.
Hepickedabookfromthebookshelfandthencommencedtoread.
Ididn’thelphim.Iwouldhavehoweverdidn’thavethemoney.
随机试题
根据《继承法》第8条的规定,继承权纠纷提起诉讼的期限为2年,自继承权被侵害之日起计算。()
A.1年B.2年C.3年D.4年E.5年根据《药品生产质量管理规范》无规定使用期限的物料,其存储一般不超过
会计软件应当具有在计算机发生故障或者由于强行关机及其他原因引起内存和外存、会计数据被破坏的情况下,利用现有数据恢复到最近状态的功能。()
因市场价格的不利变动而使银行表内和表外业务发生损失的风险是()风险。
旅游团抵达机场前,地陪可向()核实航班抵达的准确时间。
关于勘验、检查,下列哪一选项是正确的?()
“两个黄鹂鸣翠柳,一行白鹭上青天。”在古人笔下,悠闲的鸟,绝美的画________;而在今天某些人手中,却换了另一番模样。国庆期间,一张________天津、河北的万米猎网,让数千只鸟类徒遭厄运,让脆弱的生态________。填入画横线部分最恰当的一项是
“人的发现”是五四新文学的重要思想特征,下面不属于这一内容的是__________。
【B1】【B20】
A、Thedirectorprobablyisn’tabletomakeanexception.B、Thedirectorprobablywon’tseeher.C、Thedirectorusuallyisn’tver
最新回复
(
0
)