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
Solar Power without Solar Cells A dramatic and surprising magnetic effect of light discovered by University of Michigan rese
Solar Power without Solar Cells A dramatic and surprising magnetic effect of light discovered by University of Michigan rese
admin
2012-12-28
81
问题
Solar Power without Solar Cells
A dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power without traditional semiconductor-based solar cells.
The researchers found a way to make an "optical【C1】______," said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics.
Light has electric and magnetic【C2】______Until now, scientists thought the effect of the magnetic field were so weak that they could be【C3】______What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not【C4】______electricity, the light field can generate magnetic effects that are 100 million times stronger than previously expected. Under these circumstances, the magnetic effects develop strength【C5】______to a strong electric effect.
"This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation," Rand said. "In solar cells, the【C6】______goes into a material, gets absorbed and creates heat. " Here, we expect to have a very low heat load. Instead of the light being absorbed, energy is stored in the magnetic moment. Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power【C7】______What makes this possible is a previously undetected brand of "optical rectification," says William Fisher, a doctoral student in applied physics. In traditional optical rectification, light’s electric field causes a charge separation, or a pulling【C8】______of the positive and negative charges in a material. This sets up a voltage, similar to【C9】______in a battery.
Rand and Fisher found that under the right circumstances and in right types of materials, the light’s magnetic field can also create optical rectification. The light must be shone through a【C10】______that does not conduct electricity, such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn’t this【C11】______on its own, but new materials are being sought that would work at lower intensities, Fisher said.
"In our most recent paper, we show that incoherent light like sunlight is theoretically almost 【C12】______effective in producing charge separation as laser light is," Fisher said.
This new【C13】______could make solar power cheaper, the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in converting solar power to useable energy. That’s equivalent to today’s commercial-grade solar cells. "To manufacture modern solar cells, you have to do【C14】______semiconductor processing," Fisher said. "All we would need are lenses to focus the light and a fiber to guide it. Glass works for【C15】______It’s already made in bulk, and it doesn’t require as much processing. Transparent ceramics might be even better. "
【C7】
选项
A、plant
B、source
C、equipment
D、line
答案
B
解析
本题考查旬意。密歇根大学的科学家发现太阳光产生强烈的磁效应,再转换为电,所以磁效应是产生电的源泉(source)。power plant“发电厂”、power equipment“电力设备”或power line“输电线”与上文的意思接不上。
转载请注明原文地址:https://kaotiyun.com/show/UlLd777K
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
MyLifeatRendaIlearnedveryquicklythatbeingateachingassistant(TA)attheUniversityofIowawouldbedifferentfrom
ExercisingYourMemory1Agingdoesnotmeanadramaticdeclineinmemorypower,unlessyouhelpithappenbylettingyourmind
ProlongingHumanLife1Prolonginghumanlifehasincreasedthesizeofthehumanpopulation.Manypeoplealivetodaywouldhave
LivingAloneCouldBeGoodforYourWeightGoodnewsforpeoplelivingalone:Aforthcomingpapershowsthatsingleadults—o
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
DuringtheApril28earthquake,thewholeEnglandwasleftwithoutpower.FranceandseveralotherEuropeancountriessentthei
AHarmScreeningMayDotoaYoungerWomanBInvestigatingtheEffectofScreeningCEffectsPredictedbyTwoDifferentMo
随机试题
下列物品中,属于出版物的有()。
甲于1990年与乙结婚,1991年以个人名义向其弟借款10万元购买商品房一套,夫妻共同居住。2003年,甲乙离婚。甲向其弟所借的钱,离婚时应如何处理?
教育行政部门取消某甲的办学权,甲对此不服,向法院提起行政诉讼。正在甲处学习的20名学生因此中断了学习,他们需要另外找学校学习,另外租借住房或乘车回家,经济上损失较大。因此这20个学生也对取消办学权的行政决定提起了行政诉讼。法院是否应当受理这些学生的诉讼(
某建筑安装公司以包工不包料的方式完成一项建筑工程,该公司上报的工程合同注明工程劳务款为389万元,建设单位提供建筑材料250万元,部分电器线路器材56万元;工程结束后建筑公司获得提前竣工奖42万元,优质工程奖18万元。则该建筑安装企业应纳营业税的计税依据为
甲、乙、丙出资设立了有限责任公司A公司,公司章程中没有关于股权继承的规定。公司经营3年后,甲不幸车祸去世,以下说法正确的是()。
一批木材全部用来加工桌子可以做30张,全部用来加工床可以做15张,现在加工桌子、椅子和床各2张,恰好用去全部木材的1/4,剩下的木材全部用来做椅子,还可以做多少张?()
前些年翻看先生的这本书时,尽管自己对民国话题有着欲说还休的浓厚兴味.对这本话语剪辑独出心裁的编排方式下潜藏的_________常常默契会心.但读完仍是感到_________。填入画横线部分最恰当的一项是:
艺术最主要的社会功能有哪些?请结合具体的艺术作品简述艺术的社会功能如何实现。
Itisnotthe"somedayIwillwinthelottery"kindofdaydream,butthekindthattapsintothehidden,partofyourbrain.Tha
People’stastesinrecreationdifferwidely.Atarecentfestivalofpop-musicintheIsleofWight,crowdsofteenagers【C1】____
最新回复
(
0
)