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
33
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、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/3619266.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]Areyouafraid,toraiseyourhandinclass,evenwhenyoukn
[originaltext]M:Hey,Howwasyourtrip?W:Itiswonderful!Ispentmostofmy
[originaltext]M:Hey,Howwasyourtrip?W:Itiswonderful!Ispentmostofmy
[originaltext]M:Hey,Howwasyourtrip?W:Itiswonderful!Ispentmostofmy
随机试题
Whatarethespeakersdoing?[originaltext]M:OK,Fran.Thisisthesectionofg
Theeraofdividedgovernmentbegins,inauspiciously.Willthepresidentbea
John:Theradio’sterriblyloud.Couldyouturnitdownalittle?Peter:Sorry
[originaltext]M:IhavethiscameraherethatIboughtabout12monthsago.But
A. B. C. D.
建设生态文明是中华民族永续发展的千年大计。()
能把企业组织结构和企业过程联系起来的信息系统规划工具为( )。A、P/O矩阵
A.白薇B.银柴胡C.青蒿D.地骨皮E.胡黄连治疟疾之良药是
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。()
患者,女,30岁,经后血虚,为阴血耗损,阴不维阳,阳气无所依附,致肌热面赤,烦渴
最新回复
(
0
)