首页
登录
职称英语
There are two ways to create colors in a photograph. One method, called addi
There are two ways to create colors in a photograph. One method, called addi
游客
2025-04-14
17
管理
问题
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)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; green and blue mix to produce cyan. When equal parts of all three of these primary-colored beams of light overlap, the mixture appears white to the eye.
In the subtractive process colors are produced when dye(as in paint or color photographic materials)absorbs some wavelengths and so passes on only part of the spectrum. The subtractive primaries are cyan(a bluish green), magenta(a purplish pink)and yellow; these additive primaries or dyes that 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 too can produce any color in the spectrum.
Whether a particular color 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. [br] How is the passage organized?
选项
A、The reasons for a choice are explained in depth.
B、A general statement is justified by a series of historical examples.
C、Two basic causes are compared.
D、Related processes are described one after the other.
答案
C
解析
文章结构题。文章从使照片具有色彩的两种方法,加色法和减色法开头,接着分别介绍两种色法的基本原理,最后对比了两种色法,故答案为C。原文并没有对两种色法作depth解释,选项A不正确;原文没有提及historical examples,故选项B不正确;原文不是对processes的描述,选项D也不正确。
转载请注明原文地址:https://tihaiku.com/zcyy/4036542.html
相关试题推荐
Iwastohavemadeaspeechif______.A、IwasnotcalledawayB、nobodywouldhave
Adoptingthismethod,theteamraisedtheaverageyield______40%.A、atB、byC、to
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
随机试题
ProblemsoftheagedMandatory(强制性的)Retirement
在2020年四个季度中,宋杰、袁浩、黄兵三人都至少有两个季度绩效为优秀,另外还知
麻醉前用药的目的,下列哪项是错误的A.消除患者紧张心情 B.提高患者的痛阈
有关细菌的分类单位正确的是A.性状相似、关系密切的菌株组成属B.群和组也是正式分
“凡属宪法、法律规定只能由法律规定的事项,必须在法律明确授权的情况,行政机关才有
筹备业主大会的工作要求不包括()A:确认业主身份,应当以业主房屋产权证书标明的房
男性,48岁,近1周内发现血压升高156/98mmHg,服用利尿剂氢氯噻嗪降压效
宏观经济发展的四大总体目标一般用( )等指标衡量。A.国民生产总值 B.国内生
看板管理是丰田式生产系统营运的工具,其主要功能有()。A.传递生产的工作指令
关于脐带的描述,以下哪项错误A.脐带长于70cm或短于30cm属异常 B.若脐
最新回复
(
0
)