首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Why can you look at an object in the real world and see it as a three-dimensional (三维的) object, but if you see that same obje
Why can you look at an object in the real world and see it as a three-dimensional (三维的) object, but if you see that same obje
admin
2022-01-10
18
问题
Why can you look at an object in the real world and see it as a three-dimensional (三维的) object, but if you see that same object on a television, it looks flat? What’s going on, and how does 3-D technology get around the problem?
It all has to do with the way we see objects. When the light that travels to an object is sent back to our eyes, our brains understand the light and make up a picture in our minds. When an object is far away, the light travelling to one eye is parallel (平行) with the light travelling to the other eye. But as an object gets closer, the lines are no longer parallel—they move toward the same point where they join. You can see this effect if you try to look at something right in front of your nose—you’ll get a lovely cross-eyed expression.
When you look at an object, your brain measures the effort your eyes make to focus on the object as well as how much they had to gather the light to the same point. Together, this information allows you to guess how far away the object is. If your eyes had to gather the light with quite a big effort, then it stands to reason that the object is close to you.
The secret to 3-D television and films is that by wearing a special pair of glasses and by showing each eye the same picture in two different places, you can make your brain think that the flat picture you’re seeing has depth. But this actually doesn’t match up the way we see real objects. While your eyes may gather two images (形象) that seem to be one object right in front of you, they’re actually focusing on pictures further away. This is why your eyes get very tired if you try to watch too many 3-D movies in one sitting.
How does our brain judge the distance between us and an object?
选项
A、By the effort our eyes make to focus.
B、By the speed at which the object moves.
C、By the time it takes us to touch the object.
D、By the brightness of the light our eyes receive.
答案
A
解析
由文章中第三段前两句“…your brain measures the effort your eyes make to focus on the object as well as how much they…allows you to guess how far away the object is.”可知,大脑通过判断眼睛集中在物体上的精力和光线的多少来猜测物体与我们之间的距离,故选A。
转载请注明原文地址:https://jikaoti.com/ti/Jf2sFFFM
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
Whatistheconversationmainlyabout?
Whatarethesetwopeopletalkingabout?
PilotCabukwasatthecontrolseatcallingouthisclimbchecklistaftertakingoff.Keepinghimcompanyinthecopilot’sseat
Standoverthere______you’llbeabletoseeitbetter.
DearRalph,I’manewcomerhereofasmalltown.Iwould【M1】______describemyselfasshyandquietly.Beforemyclassmates
Americansocietydoesnottreatnapfriendly.Infact,saysDavidDinges,asleepspecialist(专家)attheUniversityOfPennsylva
A、worseB、moreC、furtherD、betterD本句意为:但是我相信如果我们不是被吓坏了,本可以表现得更好些。故正确的答案为D。
Therearesomeobjectsintheskythatmovesoquicklythatsometimesyouonlyseethemoutofthecornerofyoureye.Theseare
随机试题
可摘局部义齿初戴时如发现义齿就位困难,应:()
以下有关“特异性反应”的叙述中,最正确的是()。
丁某认为市政府为邻居胡某颁发的《集体上地建设用地使用证》,与自己的宅基地使用面积有部分重合,侵犯了自己的合法权益,丁某向省政府申请行政复议,但省政府在法定期限内没有作出复议决定,则下列说法正确的是哪些?
下列关于消防设施维护管理人员从业资格要求的叙述中,正确的有()。
取得大学本科学历的人员,报名参加会计专业技术中级资格考试的,还应当具备从事会计工作满()年的条件。
对于生产过程中产生的不合格品跟单员可以自行处理。()
在开发新产品时,进行调查的主要内容包括( )。Ⅰ.新产品必须符合公司发展的目标,当两者发生冲突时,公司目标优先Ⅱ.新产品必须考虑销售时期、销售额、平均保费等销售预期指标Ⅲ.作为调查过程的一部分,市场营销人员有义务检测现有产品是否能通过改善和升级来满
TheNewYorkTimeshasreportedonaproblemthatmanyofushavebutarenotawareof—Internetaddiction.Accordingtoreporte
目前常用的网络连接器主要有中继器、网桥、______和网关。
Itisatimewornsignofoldageandfrailty.Yetarthritisoften【1】______theyoung.【1】______T
最新回复
(
0
)