首页
登录
职称英语
What discovery was the basis of photography? [originaltext] The camera is oft
What discovery was the basis of photography? [originaltext] The camera is oft
游客
2023-11-13
9
管理
问题
What discovery was the basis of 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.
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。考点位于听力开头。
转载请注明原文地址:https://tihaiku.com/zcyy/3184387.html
相关试题推荐
WhatdidLondonpolicedo?[br][originaltext]Londonpolicehuntingforsus
Whatisthetopicofthetalk?[br][originaltext]AlthoughIthinktheUnit
Whatisthetopicofthetalk?[br][originaltext]AlthoughIthinktheUnit
Whatisthetopicofthetalk?[originaltext]AlthoughIthinktheUnitedSta
WhywasJennyunhappyatthebeginningoftheconversation?[br][originaltext]
ThemanwenttoSeychellesbecausehe______.[br][originaltext]M:I’veheardt
Howmanypeoplelosttheirlivesinthefire?[br][originaltext]Afiredes
Howmanypeoplelosttheirlivesinthefire?[originaltext]Afiredestroyed
Whenwilltheexamtakeplace?[br][originaltext]NowI’dliketotalktoy
Whenwilltheexamtakeplace?[br][originaltext]NowI’dliketotalktoy
随机试题
FormuchofthehistoryofAmericanhighereducation,dormsandotherstuden
某公司承接了一个银行业务系统的软件开发项目,质量要求非常高。项目经理小赵制定了项
以下哪项是会计循环的依次正确步骤?A.过账、结账、调整分录、转回分录 B.过账
A.创面界限分明,渗出少,水肿轻 B.创面由于组织脱水而形成硬焦痂 C.皮损
能够与周围组织进行营养物质交换的血管是()A.动脉 B.小动脉管 C.静
( )按质量计划中关于工程分包和物资采购的规定,经招标程序选择并评价分包方和供应
孕妇自觉有胎动一般在妊娠A:妊娠8周末 B:妊娠16周末 C:妊娠12周末
(2015年真题)产品上市需要办理备案手续,经营不需要备案和许可手续的是( )
A.吸收 B.分布 C.代谢 D.排泄 E.消除药物在体内经药物代谢酶等
阿司匹林的主要适应证不包括()A.不稳定型心绞痛 B.胃溃疡 C.急性
最新回复
(
0
)