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
34
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] Which of the following is closest in meaning to the phrase "passes on" as used in Paragraph 3?
选项
A、Judges.
B、Lets through.
C、Dies.
D、Goes over.
答案
B
解析
语义题。pass on是比较常见的动词词组,考生根据常识即可判定此词组的意思为“通过”,对比选项,只有选项B与其意思相近。故答案为B。
转载请注明原文地址:https://tihaiku.com/zcyy/4036539.html
相关试题推荐
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【
Cultureshockmightbecalledan【1】diseaseofpeoplewhohavebeensuddenly【
随机试题
Whatdoesthemanmean?[br][originaltext]F:WearegoingtovisittheSummerP
[originaltext]M:Oh,Mrs.Jones.CanItakethetestnow?Ijust...W:Excusem
[originaltext]W:Isittrue?Iheardthatthemayorisclosingthefurniturefa
实行项目法人责任制的是( )。A.政府投资的非经营性项目 B.政府投资的经营性
完善国家技术创新体系,主要有()。A:加强技术创新的环境建设 B:加强技术创
由《处方标准》可知,麻醉处方与第一类精神药品处方的最显著的区别在于处方笺A:纸质
该柱子的砌体抗压强度设计值最接近于()N/mm2。A..5.44
(1)电报、电话、广播、电视机问世之初都曾被认为会引发灾难,现在又轮到智能手机等
下列关于贷款档案管理期限的说法,不正确的是( )。A.贷款档案的保管期限自贷款
用于保护接地中性线铜芯最小截面应()10mm2。 A.不小于;B.不大于;
最新回复
(
0
)