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
Small But Wise On December 14, NASA blasted a small but mighty telescope into space. The telescope is called WISE and is abo
Small But Wise On December 14, NASA blasted a small but mighty telescope into space. The telescope is called WISE and is abo
admin
2012-12-28
55
问题
Small But Wise
On December 14, NASA blasted a small but mighty telescope into space. The telescope is called WISE and is about as wide around as a trashcan. Don’t let its small size fool you: WISE has a powerful digital camera, and it will be taking pictures of some the wildest objects in the known universe, including asteroids, faint stars, blazing galaxies and giant clouds of dust where planets and stars are born.
"I’m very excited because we’re going to be seeing parts of the universe that we haven’t seen before," said Ned Wright, a scientist who directs the WISE project.
Since arriving in space, the WISE telescope has been circling the Earth, held by gravity in a polar orbit(this means it crosses close to the north and south poles with each lap). Its camera is pointed outward, away from the Earth, and WISE will snap a picture of a different part of the sky every 11 minutes. After six months it will have taken pictures across the entire sky.
The pictures taken by WISE won’t be like everyday digital photographs, however. WISE stands for "Wide-field Infrared Survey Explorer. " As its name suggests, the WISE camera takes pictures of features that give off infrared radiation.
Radiation is energy that travels as a wave. Visible light, including the familiar spectrum of light that becomes visible in a rainbow, is an example of radiation. When an ordinary digital camera takes a picture of a tree, for example, it receives the waves of visible light that are reflected off the tree. When these waves enter the camera through the lens, they’re processed by the camera, which then puts the image together.
Waves of infrared radiation are longer than waves of visible light, so ordinary digital cameras don’t see them, and neither do the eyes of human beings. Although invisible to the eye, longer infrared radiation can be detected as warmth by the skin.
That’s a key idea to why WISE will be able to see things other telescopes can’t. Not everything in the universe shows up in visible light. Asteroids, for example, are giant rocks that float through space—but they absorb most of the light that reaches them. They don’t reflect light, so they’re difficult to see. But they do give off infrared radiation, so an infrared telescope like WISE will be able to produce images of them. During its mission WISE will take pictures of hundreds of thousands of asteroids.
Brown dwarfs are another kind of deep-space object that will show up in WISE’s pictures. These objects are "failed" stars—which means they are not massive enough to jump start the same kind of reactions that power stars such as the sun. Instead, brown dwarfs simply shrink and cool down. They’re so dim that they’re almost impossible to see with visible light, but in the infrared spectrum they glow.
The camera on WISE______.
选项
A、is equipped with expensive computers
B、produces images of objects giving off infrared radiation
C、reflects light visible to the human eyes
D、is similar to an ordinary digital camera
答案
B
解析
细节题。句意:WISE上的照相机——。短文第四段和第六段提供了答案。人类的肉眼和普通相机看到的光是可见光线(visible lights),看不见红外线辐射(infrared radiation),而WISE的相机能够看到。故选B。
转载请注明原文地址:https://kaotiyun.com/show/VlLd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
AforyoungerandolderpeopleBtotheproperfunctionofyourmemoryCiscalledlong-termmemoryDthecapacitytostorewhat
LivingAloneCouldBeGoodforYourWeightGoodnewsforpeoplelivingalone:Aforthcomingpapershowsthatsingleadults—o
ScientistsDevelopWaysofDetectingHeartAttackGermanresearchershavecomeupwithanewgenerationofdefibrillators(除颤
Onlypeopleover18areeligibletovote.
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
Choosingatopicforresearchisimportantinthatyouwillputagreatdealoftimeandenergyintoit.Ifallthetopicsare
Choosingatopicforresearchisimportantinthatyouwillputagreatdealoftimeandenergyintoit.Allinstructorswilla
FootballFootballis,Isuppose,themostpopulargameinEngland:onehasonlytogotooneoftheimportantmatchestoseethi
Theauthoriskindtothechildrenbecauseshewantedtoplayanimportantroleinthechildren’slives.Theauthormakesalot
Theyhadnowaytodisposeofthehazardouswastetheyproducedintheprocessofthecarmanufacture.
随机试题
采用国际标准的方法通常有哪些?
阴盛格阳是指()
行军散主治
万某起诉吴某人身损害赔偿一案,经过两级法院审理,均判决支持万某的诉讼请求,吴某不服,申请再审。再审中万某未出席开庭审理,也未向法院说明理由。对此,法院的下列哪一做法是正确的?(2014年卷三50题,单选)
在下列几项中心理咨询的任务包括()。
某城市某年的空气质星统计为优、良、轻度污染和中变污染四类。良的天数是优的天数的2倍,中度污染天数是轻度污染天数的3倍,优的天数的4倍与其它3类空气质量天数之和相等,那么,空气良的天数是()
陈先生在鼓励他孩子时说道:“不要害怕暂时的困难和挫折。不经历风雨怎么见彩虹?”他孩子不服气地说:“您说得不对。我经历了那么多风雨,怎么就没见到彩虹呢?”陈先生孩子的回答最适宜用来反驳以下哪项?
《马关条约》后在中国投资设立外资大型厂矿最多的国家是()。
在控制面板中设置Windows的日期样式为“yy-mm-dd”,日期分隔符为“/”。
8086微处理器在最小模式下执行输出操作时,下列哪一个选项所描述的状态是正确的?______
最新回复
(
0
)