首页
登录
职称英语
[originaltext] Today, I’ll be talking about the invention of the camera and
[originaltext] Today, I’ll be talking about the invention of the camera and
游客
2024-06-04
15
管理
问题
Today, I’ll be talking about the invention of the camera and photography. The camera is often thought to be a modem invention. But as early as 1727, a German physicist discovered that light darkens silver salt, a chemical compound. Using as a camera, a big box with 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 photograph he made in 1826 still exists. The painter, Daguerre improved on the process by placing common salt 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 photograph became truly modern.
In 1860’s, Matthew Bradey was able to take his famous pictures of the American Civil War. In the 20th century, George Eastman of the Untied States simplified film developing, and Dr. Edwin Land invented the so-called "instant" camera with self-developing film. If we say that photography came into existence in 1839 it follows that it has taken more than one hundred years for the camera to reach its present condition of technical refinement.
选项
A、He was a brave soldier.
B、He took war 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/3619267.html
相关试题推荐
[originaltext]Somepartsoftheeartharemorelikelytohavequakesthano
[originaltext]Somepartsoftheeartharemorelikelytohavequakesthano
[originaltext]TheGoldenGateBridgejoinsthebeautifulcityofSanFranci
[originaltext]Everycountrytendstoacceptitsownwayoflifeasbeingth
[originaltext]W:Whatareyoudoingthisterm?M:Oh,I’mstillstudyingEnglis
[originaltext]W:Whatareyoudoingthisterm?M:Oh,I’mstillstudyingEnglis
[originaltext]W:Whatareyoudoingthisterm?M:Oh,I’mstillstudyingEnglis
[originaltext]Areyouafraid,toraiseyourhandinclass,evenwhenyoukn
[originaltext]M:Hey,Howwasyourtrip?W:Itiswonderful!Ispentmostofmy
[originaltext]M:Hey,Howwasyourtrip?W:Itiswonderful!Ispentmostofmy
随机试题
InthemonthofSeptember,inBritain,youmayseelargenumbersofbirds【C1
PolitebehaviorisimportantintheAustraliansociety."Please"and"thank
已知某带权图G的邻接表如下所示,其中表结点的结构为: 则图G是()
产生抗体的细胞是:A.T细胞 B细胞 C.自然杀伤细胞 D.浆细胞
信息系统集成公司A(以下简称A公司)于2012年5月承接了某市级银行的计费数据库
针对当前中小企业普遍遭遇的“融资难”“自主创新难”“公平待遇难”等问题,人民政协
鲁迅先生在民国十四年曾经说过:“我觉得革命以前,我是做奴隶,革命以后不多久,就受
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
(2013年真题)某市政府征收辖区内某村的部分集体土地用于建造港口。该村村民孙某
对于混凝土重力坝坝体的防渗与排水设施,下面说法正确的是()。A.多采用一层
最新回复
(
0
)