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
48
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、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://tihaiku.com/zcyy/3631787.html
相关试题推荐
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,es
[originaltext]Pullingheavysuitcasesalldayinthesummerishardwork,es
[originaltext]Ifyou’reinchargeofaproject,thekeytosuccessisgettin
[originaltext]W:Tony,Ijustmovedintomynewapartment,andIneedtohavet
[originaltext]W:HowwasyourtriptotheGrandCanyon?M:Itwasexcellent!We
[originaltext]W:HowwasyourtriptotheGrandCanyon?M:Itwasexcellent!We
[originaltext]ThisisRayMcCarthywiththenews.Reportsarecominginof
[originaltext]ThisisRayMcCarthywiththenews.Reportsarecominginof
[originaltext]Dr.AllenHershdesignssmellsforbusinesses.Hesaysthati
[originaltext]Dr.AllenHershdesignssmellsforbusinesses.Hesaysthati
随机试题
Individualshavenothingtodotoimprovetheenvironment.Governmentsandl
February14isValentine’sDay.Althoughitiscelebratedasalovers’holid
当采用优质粉煤灰做掺合料,可作为胶凝材料取代部分水泥,有利于节约工程部分材料的造
上市公司应在定期报告中披露报告期内股权激励计划的实施情况,不包括( )。A.股
可用于静脉注射用乳剂的乳化剂的是A.泊洛沙姆188 B.司盘60 C.吐温8
在追求自我和个性的90后眼里,_______职业选择观念已经无法阻挡他们打破现状
控制性详细规划的控制指标分为规定性指标和指导性指标,下列指标中属于规定性指标的是
关于禁止令,下列说法正确的是A.甲犯信用卡诈骗罪被宣告缓刑,法院可以同时宣告禁止
张三(19岁)、李四(23岁)共同涉嫌间谍罪,张三聘请张律师担任自己的辩护人,李
某企业为提高员工的劳动生产率采取了以下措施,分别属于何种类型的措施教育员工树立主
最新回复
(
0
)