首页
登录
职称英语
Which fonms was the basis for photography? [br] [originaltext] The camera is
Which fonms was the basis for photography? [br] [originaltext] The camera is
游客
2023-11-16
14
管理
问题
Which fonms was the basis for photography? [br]
The camera is often thought to be a modern invention. But as early as 1727, a German physicist discovered that 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 base of film today. Then a French scientist made the first permanent picture by using a special piece of metal sensitized with silver salt. A photography he made in 1826 still exists. The painter Dagear 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 photographs. And it wasn’t until other scientists developed the kind of paper we now use that good printing was possible and photography became truly modern. In 1860’s Matthew Brady was able to take his famous pictures of the American Civil War, thus making portrait poses very popular. In the 20th century, George Eastmen of the United States simplified film developing, and Edwards Land invented the so-called instant camera with self-developing film. If we say that the photography came into existence in 1839, it follows that it has taken more than one hundred years for the cameras to reach its present condition of technical refinement.
选项
A、using a special paper
B、adding common salt to silver salt
C、tinting the temporary image
D、using a special piece of metal
答案
D
解析
细节题。首张永久性照片如何制作的,采用一种特殊金属。此题的考点位于话语连接词then后面。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3191909.html
相关试题推荐
WhatwasPaulaRadcliffe’sperformancelikeinAthens?[br][originaltext]
WhatwasPaulaRadcliffe’sperformancelikeinAthens?[br][originaltext]
TheTurkishParliament’samendmentoftheconstitutionaimsat[originaltext]
WhichofthefollowingisNOTtrueforeachofthefivewinners?[originaltext]
Whoaretalking?[br][originaltext]W:Oh,amIgladtoseeyou!YoutookIntro
Whoaretalking?[br][originaltext]W:Oh,amIgladtoseeyou!YoutookIntro
Whendoesthisconversationtakeplace?[br][originaltext]M:Hey,Helen,howa
Whendoesthisconversationtakeplace?[originaltext]M:Hey,Helen,howareyou
Howmanystudentswereinthistestabouteconomics?[br][originaltext]Ho
Howmanystudentswereinthistestabouteconomics?[originaltext]Howmuch
随机试题
JennyandPaulagreetheyneeda___________________fortheproject.timetable
患儿,男,2岁,体重9kg。入托体检时发现心脏杂音前来就诊,曾患肺炎3次,有喂养
下列不属于获得从业资格的途径是( )。A.通过科目一和科目二的考试 B.通过
以阴阳失调来阐释实热或实寒,其病机是A:阴阳离决 B:阴阳偏盛 C:阴阳偏衰
有关寄生虫感染方式,错误的描述是A、丝虫——通过白蛉的吸血叮咬B、血吸虫——接
雅典的教育制度注重( )A.德智体美和谐发展 B.军事 C.文字 D.体
共220/380V配电系统总进线箱采用Ⅰ级实验SPD,Iimp=50kA连接SP
水运工程实行邀请招标的,应报()审批。A.上级管理部门 B.港区海事部门
当需要使用非渗水土时,其含水量应()。A.低于塑限,其分层填筑铺土厚度应减薄20
高级路面的特点是路面强度高、刚度大、()。A、稳定性好 B、建造成本低 C
最新回复
(
0
)