首页
登录
职称英语
The first permanent picture was made by using [br] [originaltext] Today I wi
The first permanent picture was made by using [br] [originaltext] Today I wi
游客
2023-11-20
42
管理
问题
The first permanent picture was made by using [br]
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 photographs. 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、1727.
B、1826.
C、1839.
D、1860.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3204922.html
相关试题推荐
Wherewasthedonor’smeetingheld?[br][originaltext]AtopYugoslavoffic
What’stherelationsbetweenthespeakers?[br][originaltext]F:WhatIcan’tm
What’stherelationsbetweenthespeakers?[originaltext]F:WhatIcan’tmakeou
Whichtypeofrecordingisthetalkmostprobably?[br][originaltext]Hello
Whichtypeofrecordingisthetalkmostprobably?[br][originaltext]Hello
Wherehasthewomanbeen?[br][originaltext]M:It’sgoodtoseeyouback.How
Wherehasthewomanbeen?[br][originaltext]M:It’sgoodtoseeyouback.How
Wherehasthewomanbeen?[br][originaltext]M:It’sgoodtoseeyouback.How
Wheredoesthisconversationprobablytakeplace?[br][originaltext]W:Goodaf
Wheredoesthisconversationprobablytakeplace?[originaltext]W:Goodafternoo
随机试题
Scientistsareactivelyinvestigatingthefeedbackmechanismwithinthephys
ZandraJohnsonisalivingproofthatitisnevertoolatetostartyourown
平面中有几处设置悬挑梁?() A.2处 B.3处
取牡丹皮粉末进行微量升华,镜检可见A.黄色针状、片状或羽毛状结晶B.长柱形、针状
进行设备电气闭锁回路验收时,应对电气设备操作电气闭锁回路每个闭锁条件进行逐一实操
农户老张的田里有一堵16米长的围墙,老张想利用现有的围墙作为其中一边,修建一个长
把下面六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项(
根据《建筑设计防火规范》GB50016-2014(2018版),下列关于设置消
共用题干 1916年,随着联合汽车公司并入“通用”,阿尔弗雷德·斯隆出任通用副
北京市工商行政管理局认定新凤凰有限责任公司生产假冒伪劣医疗器械,对其生产设备、设
最新回复
(
0
)