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
2023-09-10
32
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/3003001.html
相关试题推荐
[originaltext]Therearetwokindsofmemory:short-termandlongterm.Infor
[originaltext]Therearetwokindsofmemory:short-termandlongterm.Infor
[originaltext]HenrySmithtaughtscienceattheCitySchool.Oncehewentt
[originaltext]M:Canyoutellmeabouttheuniversityshuttlebussystem?This
[originaltext]M:Canyoutellmeabouttheuniversityshuttlebussystem?This
[originaltext]M:Canyoutellmeabouttheuniversityshuttlebussystem?This
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Scientistssaythatmostdoctorsandpatientsalreadyknowwh
随机试题
SECTION3Questions21-30Questions21-24Completethenotesonthepurposeso
Whatisthisnewsmainlyabout?[br][originaltext]Consumers’prioritiesa
DealingwithLifeAbroadI.Cultureshockoflifeabroad
J煤矿为井工,生产能力120万t/年,共有员工1200人。该矿地质构造复杂,矿井
关于《宪法》的相关规定,下列叙述错误的是()。A.城市的土地属于国家所有
中国彩电行业正在山坡上,每一个奋力往上攀登的企业,都是身经百战,在激烈的竞争中杀
下列选项中,属于人口规模预测方法中“劳动平衡法”的是()。A.依据“按一定比
运动员在比赛中容易做出侵犯行为,最有可能的原因是A.运动时人们的唤醒水平较高
招标人自行组织招标应具备的条件和能力有( )。A.有与招标工程规模和复杂程度相应
某设备2年前的原始成本是50000元,目前的账面价值是30000元,现在的市场价
最新回复
(
0
)