首页
登录
职称英语
The first permanent picture was made by using_________ [br] [originaltext] To
The first permanent picture was made by using_________ [br] [originaltext] To
游客
2023-11-23
70
管理
问题
The first permanent picture was made by using_________ [br]
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. 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 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 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 photo- graphs. 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 war 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:http://tihaiku.com/zcyy/3212416.html
相关试题推荐
[originaltext]I:Goodmorning,everyone.TodayI’dliketointroduceProfessor
[originaltext]M:Thelasttheoryadvancedduringthelastcenturyisasocialo
[originaltext]M:Thelasttheoryadvancedduringthelastcenturyisasocialo
[originaltext]M:Thelasttheoryadvancedduringthelastcenturyisasocialo
[originaltext]I:Goodmorning,listeners.Today,weareveryhappytohaveDoct
[originaltext]I:Goodmorning,listeners.Today,weareveryhappytohaveDoct
[originaltext]I:Goodmorning,listeners.Today,weareveryhappytohaveDoct
[originaltext]I:Goodmorning,listeners.Today,weareveryhappytohaveDoct
[originaltext]J:Ohyes,theyhaveagymnasiumthattheguestscanuse.There’s
[originaltext]J:Ohyes,theyhaveagymnasiumthattheguestscanuse.There’s
随机试题
Themainaimofthefestivalspokespersonatthegatheringisto[br][original
December1D
A)Dinosaurs,StarWars,trainschedules,Disneyprincesses,maps,LEGO—subje
全面质量管理的精髓是( )。A.质量第一 B.用户至上 C.预防为主 D
施工成本分析是通过比较,以了解和研究成本的变动情况和因素。为此,可以用来与成本核
企业债券的定价存在利率限制,要求发债利率不高于同期银行存款利率的()。A.
Paragraph4_____A.Potatoes’LowerInfla
在日常生活中,我们经常把被子拿到太阳底下晒一下,其最可能的原因是()。 A.
根据我国《保险法》,保险人法定解除保险合同的情形包括()。A.投保人因一般过失
费雪认为,货币流通速度在短期内可视为常数,交易量也相对稳定,因而可以得出物价的水
最新回复
(
0
)