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
2023-09-15
27
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、he was a famous soldier.
B、he took was 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/3015520.html
相关试题推荐
[originaltext]Atthebeginningofthe20thcentury,anewmusiccalledjazz
[originaltext]FindingajobintheUnitedStatestakesspecificskills.The
[originaltext]Themostsurprisingtrendistheincreasinguseofillegaldr
[originaltext]Themostsurprisingtrendistheincreasinguseofillegaldr
[originaltext]Themostsurprisingtrendistheincreasinguseofillegaldr
[originaltext]W:Thisevening,theguestspeakerwithusisDr.Bush.He’sgoin
[originaltext]W:Thisevening,theguestspeakerwithusisDr.Bush.He’sgoin
[originaltext]W:Thisevening,theguestspeakerwithusisDr.Bush.He’sgoin
[originaltext]W:Hi,ProfessorJohnson.M:Hi,Anna.WhatcanIdoforyou?W:
[originaltext]Aseveryschoolboyknows,themostimportantrawmaterialsof
随机试题
CompletetheStudentProfilebelow.UseNOMORETHANTHREEWORDSORANU
PassageThree(1)IbeganlearningGermanattheageof13,andI’mstill
MediaSelectionforAdvertisementsA)Afterdeterminingthet
PurpleCloudMountainPurpleCloudMountain,whosena
中国将努力确保到2015年就业者接受过平均13.3年的教育。如果这一目标得以实现,今后大部分进入劳动力市场的人都须获得大学文凭。在未来几年,中
钻孔灌注桩施工中单桩混凝土灌注时间说法正确的宜控制在()内。A.1.2倍混
关于基坑土石方工程采用轻型井点降水,说法正确的是()。A.U形布置不封闭段
当同一个认证机构对同一个组织的两个不同的体系一起审核时,称为()。[2008年
下列选项中,不能作为合伙组织出资形式的是( )。 A.货币 B.实物 C
(2019年真题)目前国内商业银行资产托管业务的品种有()。A.证券投资基
最新回复
(
0
)