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
The first permanent picture was made by using_________
The first permanent picture was made by using_________
admin
2009-01-05
38
问题
The first permanent picture was made by using_________
Today I will be talking about the invention of the camera and photography.
Camera is often thought to be a modern invention. But as early as 1727, a German physicist discovered light darkened silver salt, a chemical compound. Using as a camera, a big box with a small hole to let the light in, he made temporary images on the salt. Silver salt is still the basic film today. Then a French scientist made the first permanent picture by using a special piece of metal sensitized with silver salt. A photograph he made in 1826 still exists.
The painter DeGair improved on the process by placing common salt, the kind we eat, on the metal. This was in 1839, the official date of the beginning of photography. But the problem was the printing of the photo- graphs. And it was not until other scientists developed the kind of paper we now use that good printing was possible, and photography became truly modern.
In the 1860’s, Mathew Brady was able to take his famous pictures of the American Civil War, thus making portrait poses very popular. In the 20th century, George Eastman of the United States simplified film developing, and Edwin Land invented the so-called instant camera with self-developing film.
If we say photography came into existence in 1839, it follows that it has taken more than 100 years for the camera to reach its present condition of technical refinement.
选项
A、A quick process of developing film.
B、A new kind of film.
C、An automatic printer.
D、A kind of camera that develops its own film.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/hpBK777K
0
专业英语四级
相关试题推荐
Despitealloftheadvancesinmedicine,healthcareprovidershaveneverbeenonthecuttingedgeofnewbusinessandmarketin
ForadevelopingcountrylikeIndiawhoseecologicalandsocio-economicsystemsarealreadyunderpressurefromrapidurbaniza
Tolive,learn,andworksuccessfullyinanincreasing【S1】______complexandinformation-richsociety,studentsmustbeable
ComputerCrimeI.IntroductionCurrentsituation:theincreaseinthenumberandtypesofcomputercrimeII.【T1】______
RecyclingTheconceptofgreenconsumerismhasgainedmomentumoverthelastdecade.However,threeessentialkeysarene
PASSAGEFOURWhatisthenatureoftheBritishnationembeddedintheBritishlanguage?
A、Hergoalwastohelpthemcomeupwithamessageandmakeapicturethatrelatedtothemessage.B、Shewouldintroducetheles
A、Agoodteachercanteachseveralsubjects.B、Agoodteachercaninvolvestudentsfromdifferentfields.C、Agoodteachershoul
A、Ittaughtstudentshowtousescannersandothermultimediadevices.B、Ithadstudentsbuildadatabaseofpicturesoftheirg
It’sdisturbingtopictureyourkindergartnerinacasino,butmaybeyououghttotry.Americankidsarebornintoaculturetha
随机试题
新入职的你对工作百倍投入,尽心尽责。但基层民调结果显示群众对你的认可度很低,上级也接到群众对你工作能力和水平的质疑。请问你会如何改变这种局面?
(2009年)比例环节的奈奎斯特曲线占据复平面中()。
下列关于建筑职工意外伤害保险的表述正确的是()。
《建筑法》第7条规定:建设单位应当按照国家有关规定向工程所在地县级以上人民政府建设行政主管部门申请领取施工许可证。但是,()除外。
会计职业道德教育的途径包括()。
保荐人尽职调查的绝大部分工作集中于()
下列交易或事项产生的现金流量中,属于投资活动产生的现金流量的有()。
下列各项中,可以成为税收法律关系主体的有()。
岗位与薪酬的对应关系是线性关系的情况下,曲线越陡,说明()。
奥运一百多年的历史始终陷入一种__________,一方面它高扬超越民族的人类精神,另一方面参与竞争的基本单位是民族国家。前者表现为超越功利的尊重和欣赏,后者则是更实在的、不敢怠慢的国家荣誉和自尊心,金牌多寡成了竞争的__________。依次填入
最新回复
(
0
)