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
2
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/3587474.html
相关试题推荐
[originaltext]Italy’scapitalRomeisafamoustouristattraction,butther
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]AyoungmanwholivedinLondonwasinlovewithabeautiful
[originaltext]AyoungmanwholivedinLondonwasinlovewithabeautiful
[originaltext]Elephantslivemostlyongrass,leavesandfruit.Theyalsoe
[originaltext]Elephantslivemostlyongrass,leavesandfruit.Theyalsoe
[originaltext]M:Let’sgoswimmingoveratthestudentcenter.W:I’dliketo,
[originaltext]M:Let’sgoswimmingoveratthestudentcenter.W:I’dliketo,
随机试题
Thelandladycouldnotputupwithusbecauseallherroomswerereserved.A、put
HowtheCIAWorks[A]DespiteplentyofHollywoodfilmsabouttheCIAan
[originaltext]M:Whatmadeyoudecideonthistypeofoccupation?W:Oh,to
顾名思义,这是一朵再放的花朵。它曾经绽开在大中学生的教材里,摇曳在中文老师的
在观看红色墙面一段时间后,再看白色墙面,短时间内会感到白色墙面( )。A.有红
某分部工程,工程量为1000m3,计划5天完成,每天均匀施工,预算单价为200元
商业银行的借款人由于经营问题,无法按期偿还贷款,商业银行这部分贷款面临的是()。
某女,20岁。平素情志抑郁,因失恋而致神志异常,诊断为癫病,临床表现可见()A
甲公司有供电、燃气两个辅助生产车间,公司采用交互分配法分配辅助生产费用。本月供电
某房地产开发商拖欠承包商工程款700万元,承包商认为可以用开发的商品房抵账,因此
最新回复
(
0
)