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
2024-05-07
41
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、1727.
B、1839.
C、1823.
D、1860.
答案
B
解析
What does the speaker regard as the official date of the beginning of photography?
转载请注明原文地址:https://tihaiku.com/zcyy/3587475.html
相关试题推荐
[originaltext]ItwasagloriousdaywhenSteveDobsonrealizedthemountain
[originaltext]ItwasagloriousdaywhenSteveDobsonrealizedthemountain
[originaltext]Therearethreekindsofgoals,short-term,medium-rangeand
[originaltext](35)Doyouknowhowtoadvertiseforabank?Ifyouaskpeopl
[originaltext](35)Doyouknowhowtoadvertiseforabank?Ifyouaskpeopl
[originaltext]W:Whatdidyouthinkoftheexams,Pete?Ireckontheyweredead
[originaltext]M:Hello.HowcanIhelpyou?W:I’dliketorentacarforsome
[originaltext]M:Now,whatseemstobethetrouble,Mrs.Stephens?W:I’vebeen
[originaltext]M:Now,whatseemstobethetrouble,Mrs.Stephens?W:I’vebeen
[originaltext]M:Now,whatseemstobethetrouble,Mrs.Stephens?W:I’vebeen
随机试题
Doyouforgettoturnoffthelightsandheaterswhenyougooutofaroom?
DirectionsforQuantitativeComparisonQuestions:Someofthefollowingquest
[originaltext]IfyouplantoremainintheUnitedStatesforanylengthof
Withtherapidspreadoftheinterneteverywhereintheworld,andthe【C1】_
下列关于输血注意事项的叙述不正确的是( )。A.在输注时,可从输血器管路中注射
下列不属于促销策略的是()。A.派发各种宣传资料 B.基金产品推介会 C.
关于阿托品的叙述,正确的是A.以左旋体供药用 B.分子中无手性中心,无旋光性
压杆下端固定,上端与水平弹簧相连,如图所示,该杆长度系数μ值为:A.μC.0.
以下哪个机场2011年旅客吞吐量比上年增长的人数最多?() A.成都双流
低压熔断器用于低压系统中设备及线路的过载和短路保护,下列选项中有限流特性的低压熔
最新回复
(
0
)