首页
登录
职称英语
[originaltext] Today I will be talking about the invention of the camera and
[originaltext] Today I will be talking about the invention of the camera and
游客
2024-06-13
4
管理
问题
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 used 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 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、he was a famous soldier.
B、he took was photographs.
C、he painted portraits.
D、he designed a portable camera.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3631786.html
相关试题推荐
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,es
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,es
[originaltext]Ifyou’reinchargeofaproject,thekeytosuccessisgettin
[originaltext]Ifyou’reinchargeofaproject,thekeytosuccessisgettin
[originaltext]Ifyou’reinchargeofaproject,thekeytosuccessisgettin
[originaltext]W:Tony,Ijustmovedintomynewapartment,andIneedtohavet
[originaltext]W:Tony,Ijustmovedintomynewapartment,andIneedtohavet
[originaltext]W:Tony,Ijustmovedintomynewapartment,andIneedtohavet
[originaltext]W:HowwasyourtriptotheGrandCanyon?M:Itwasexcellent!We
[originaltext]Dr.AllenHershdesignssmellsforbusinesses.Hesaysthati
随机试题
Insemanticstudies,______referstotheinherentmeaningofthelinguisticform.
认为心理发展是“连续的…‘没有阶段的…‘发展只有量的增加”的发展心理学理论是(
举办大型群众性活动,承办人应当依法向()申请安全许可。A.消防救援机构 B
证券产品卖出时机选择的策略有(). Ⅰ.股票价格走势达到高峰,再也无力继续攀
关于血沉的临床应用,错误的是A.风湿热静止期血沉正常,活动期血沉加快B.结核病静
休克患者使用血管扩张药物,说法正确的是A.补充血容量同时即可使用 B.血容量基
在建筑工程勘察中,当钻孔采用套管护壁时,套管的下设深度与取样位置之间的距离,不应
下列关于各项年金的说法中,正确的有( )。A.普通年金终值是每次收付款的复利终
发育毒性的具体表现不包括( )。A.生长迟缓 B.致畸作用 C.功能不全或
下列各项中,不属于复式记账法的是()。A、借贷记账法 B、收付记账法 C、增
最新回复
(
0
)