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
45
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 color filter would absorb red wavelengths?
选项
A、Red.
B、Magenta.
C、Cyan.
D、Yellow.
答案
C
解析
这是一道关于减色法过程的细节题。根据第三段第二句话可知,减色法中的三原色分别是蓝绿色、紫红色、黄色;它们分别从白色中吸取红色、绿色、蓝色的光波,故可得出蓝绿色吸收的是红色的光波。
转载请注明原文地址:https://kaotiyun.com/show/1nQd777K
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
TheFirstFourMinutesWhendopeopledecidewhetherornottheywanttobecomefriends?Duringtheirfirstfourminutestog
AHealthProfileAhealthprofileisaportraitofallofthefactorsthatinfluenceyourhealth.Todrawyourhealthprofil
Intelligence:aChangedView1Intelligencewasbelievedtobeafixedentity,somefacultyofthemindthatweallpossessandw
A.Doescanceralwayscausepain?B.Cancancerbeprevented?C.Whatiscancer?D.Howcommoniscancer?E.Whatcausescancer?
Decidingonthevacation’sdestination(目的地)withyourfamilycanbeadifficulttask,especiallywhenyourchoiceofplacedoesn
LifeintheUniverseManyscientiststodayareconvincedthatlifeexistselsewhereintheuniverse-lifeprobablymuchlike
Thestudyshowedthatmostofthegirls______.Whatkindofinstitutiondoestheleadresearcherworkwith?
Thesefiguresdonottakeintoaccountthechangesthathavetakenplaceinrecentyears.
Iamverysorryforringingyoulatelastnight.
随机试题
八岁的小乐具有音乐天赋,创作了一首乐曲。关于该乐曲的著作权,下列说法正确的是()。
企业在市场营销实践中,能否注重市场营销道德,增强社会责任感,作出符合道德规范的营销决策,主要受制于()
中国传统的单座建筑殿堂房舍等平面构成一般以()的布置方式来表示。
工程建设监理实施细则的编制依据包括()。
制定一次性劳动定额时,通常采用______。
根据个人基本养老保险扣缴的现行政策,个人基本养老保险扣缴基数按照上年当地在岗职工平均工资()为依据。
某公司2006年末的长期资本结构为:股本1000万元(每股面值2元),资本公积4000万元,盈余公积400万元,未分配利润500万元,合计5900万元。2006年公司的息税前利润为1800万元,利息为200万元,预计明年息税前利润将上升5%。公司当前的股
市场调查报告的典型性主要体现在()。
与其他物质生产部门相比。农业生产的突出特点是——性、——性和——性。
Youmusthavebeentroubledbywhentosay"Iloveyou"becauseitisoneofthegreatestpuzzlesinourlife.Whatifyous
最新回复
(
0
)