首页
登录
职称英语
[originaltext] The camera is often thought to be a modern invention. But as
[originaltext] The camera is often thought to be a modern invention. But as
游客
2023-08-30
36
管理
问题
The camera is often thought to be a modern 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 tight 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 treated with silver salt. A photograph he made in 1826 still exists. A painter improved on the process by placing common salt the kind we eat on the meal. 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. The good printing was possible and photography becomes truly modern.
In the 20th century, a man from the United States simplified film developing, and another American invented the so-called "instant" camera with serf-developing film. If we say that 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、Light darkens silver salt.
B、Light darkens natural salt.
C、Light darkens silver.
D、Light darkens self- developing film.
答案
A
解析
What discovery was the basis of photography?
转载请注明原文地址:https://tihaiku.com/zcyy/2971210.html
相关试题推荐
[originaltext]M:Goodmorning,class.W:Goodmorning,sir.M:Todaywe’lldisc
[originaltext]Asyoupreparetobecomeelementaryschoolteachers,you’llb
[originaltext]Asyoupreparetobecomeelementaryschoolteachers,you’llb
[originaltext]Asyoupreparetobecomeelementaryschoolteachers,you’llb
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNo
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNo
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNo
[originaltext]W:Allright,thatcomesto$20.75.Doyouhaveoneofourstore
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]Thenewyearalwaysbringswiththeculturaltraditionofnew
随机试题
[originaltext]M:HiJane,pleasecomeinandtakeaseat.W:Well,youwouldl
功夫(Kungfu)是一种典型的中国传统文化,它是一项既活动肌肉又活动大脑的运动。同时,功夫不仅是一项体育运动,也是一种艺术形式。它被用来治病和自卫,
DepartingforLosAngelesisnoordinary【C1】______whereasforforeignstud
根据运输业的特殊性,运输成本分为固定设施成本、移动设备拥有成本和( )。A.运
设备安装与装饰工程中的施工顺序不正确的有()。A.先进行设备管线的安装,再进行
滞针有哪些表现?如何预防和处理?
下列关于租赁筹资的叙述,正确的是()。A.经营租赁的租期通常较长 B.融资租
外来人口的管理是社区组织的一项经常性工作,其具体工作内容包括( )。A.搞好宣
某患者,在施行右叶甲状腺腺瘤切除过程中,发现左叶有-1cm直径结节。冰冻切片诊为
最新回复
(
0
)