首页
登录
职称英语
Which fonms was the basis for photography? [originaltext] The camera is often
Which fonms was the basis for photography? [originaltext] The camera is often
游客
2024-10-18
31
管理
问题
Which fonms was the basis for photography?
The camera is often thought to be a modern invention. But as early as 1727, a German physicist discovered that 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 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 photography he made in 1826 still exists. The painter Dagear 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 wasn’t until other scientists developed the kind of paper we now use that good printing was possible and photography became truly modern. In 1860’s Matthew Brady was able to take his famous pictures of the American Civil War, thus making portrait poses very popular. In the 20th century, George Eastmen of the United States simplified film developing, and Edwards Land invented the so-called instant camera with self-developing film. If we say that the photography came into existence in 1839, it follows that it has taken more than one hundred years for the cameras to reach its present condition of technical refinement.
选项
A、Light darkens silver salt.
B、Light darkens common salt.
C、Light darkens silver.
D、Light darkens self-developing film.
答案
A
解析
细节题。光线能使银光盐变暗的发现使得照片诞生。考点位于录音开头,句子结构是一个that宾语从句。
转载请注明原文地址:https://tihaiku.com/zcyy/3806470.html
相关试题推荐
WhichofthefollowingisNOTmentionedasahelpininterviews?[originaltext]
FoodwasteinSeattleisfinallymadeintoakindof[originaltext](11)Int
Themanstopstotakehisdogoutsidetodoexercisebecause[originaltext]M:Th
WhatdoestheMinisterwanttokeepaneyeon?[br][originaltext]RussianE
Whatisthefocusofthenews?[br][originaltext]FINAsaidGreekgovernmen
HowmanyapartmentswillbebuiltinHarHoma?[br][originaltext]Israelha
HowmanyapartmentswillbebuiltinHarHoma?[originaltext]Israelhasanno
Whichfonmswasthebasisforphotography?[br][originaltext]Thecamerais
Whichfonmswasthebasisforphotography?[br][originaltext]Thecamerais
WhatisthefindingofHarvardUniversity’sstudy?[br][originaltext]Astu
随机试题
Asstudentsreturntoschoolthisfall,parentswillagainworryaboutnewil
Whatproductsarethetwoletterstalkingabout?[br]HowcanMr.LouisSmithge
为防止妊娠反应及妊娠中毒症应给孕妇多补充()A.维生素PP和维生素E
对钢结构构件进行焊后成品的外观检验之前,需将焊缝附近10~20mm的污物清除干净
单层工业厂房设计中,若需将伸缩缝、沉降缝、抗震缝合成一体时,下列对其设计构造做法
脑瘫最常见的类型是A.痉挛型 B.手足徐动型 C.共济失调型 D.强直型
影响伤口愈合的因素除外A.患者年龄 B.患者性别 C.有无贫血 D.伤口有
商业银行在开展个人理财业务中,应妥善保管相关合同和各类授权文件,并至少每年重新确
在当代西方税收学界看来,设计和实施税收制度最重要的原则是()。A.公平原则
纤维素样坏死,常见于哪些组织A、结缔组织 B、骨组织 C、神经组织 D、脂
最新回复
(
0
)