首页
登录
职称英语
The first permanent picture was made by using [br] [originaltext] Today I wi
The first permanent picture was made by using [br] [originaltext] Today I wi
游客
2023-11-20
22
管理
问题
The first permanent picture was made by using [br]
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. Using 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 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 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/3204923.html
相关试题推荐
WhatnewmissionisSpaceAdventuresplanning?[br][originaltext]SpaceAd
Whatisthenewsmainlyabout?[br][originaltext]YahooonThursdaysaidi
Whatisthisnewsabout?[br][originaltext]Malaysiadeclaredastateofe
Whatisthisnewsabout?[originaltext]Malaysiadeclaredastateofemergen
WhichstatementisNOTtrueabouttheexplosions?[originaltext]Twoexplosi
WhatisexpectedtoriseintheU.S.from2003to2010?[br][originaltext]
WhatisexpectedtoriseintheU.S.from2003to2010?[br][originaltext]
Whenwasthefirstcheesefactoryestablished?[originaltext]Althoughchee
Whatisthispassageabout?[br][originaltext]Indiaisthelandoffestiv
Whatisthispassageabout?[br][originaltext]Indiaisthelandoffestiv
随机试题
[originaltext]CarbonFootprintAca
______wasproclaimedCanada’snationalanthemonJuly1,1980.A、GodSavetheQue
Whatisshowrooming?[br][originaltext]M:Hello,Linda.W:Hello,Rob.M:Happ
ThesignsofAmericaninfluenceonCentralAmericaareeverywhere:McDonald’
间接融资相对集中于银行或非银行金融机构,国家对金融机构的管理一般都较为严格,银行
患者咳嗽阵作,痰中带血鲜红,烦躁易怒,胸胁疼痛,小便黄赤,大便干结,舌苔黄,脉弦
一类精神药品的处方保存A.3年 B.2年 C.5年 D.10年 E.1年
下列措施不属于专业分工和协作原则的是()。A.实行系统管理 B.设立必要的
社会自我基本成熟的时期在( )。 A.婴儿期 B.幼儿期 C.童年期
在确定规划设计条件时,负责持建设项目的批准文件和确定的建设用地通知书向城市规划管
最新回复
(
0
)