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
59
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. "
【C8】
选项
A、up
B、down
C、apart
D、together
答案
C
解析
本题考查介词。or在本句的意思是“即”,后面的词语是解释专业术语charge separation(电荷分离)。选apart与pushing构成pushing apart。pushing apart的意思相当于separation。所以本题的答案是C。
转载请注明原文地址:https://kaotiyun.com/show/FlLd777K
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
ExercisingYourMemory1Agingdoesnotmeanadramaticdeclineinmemorypower,unlessyouhelpithappenbylettingyourmind
CanAddedCalciumHelpOlderBones?NewZealandresearcherssayguidelinesadvisingseniorstoconsumeatleast1,000to1,2
ScientistsDevelopWaysofDetectingHeartAttackGermanresearchershavecomeupwithanewgenerationofdefibrillators(除颤
ScientistsDevelopWaysofDetectingHeartAttackGermanresearchershavecomeupwithanewgenerationofdefibrillators(除颤
ScientistsDevelopWaysofDetectingHeartAttackGermanresearchershavecomeupwithanewgenerationofdefibrillators(除颤
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensofthousan
AnimalsintheDesertSomedesertanimalscansurvivetheverystrongsummerheatanddrynessbecausetheyhaveveryunusualcha
Below600feetoceanwatersrangefromdimlylittocompletelydark.
Accordingtothepassage,MountUnzenWhyisthisresearchprojectsoimportanttoJapan?
随机试题
作用于大脑皮质,激活、保护和修复神经细胞,促进大脑蛋白质合成,改善脑功能的酰胺类药物是
监狱起诉意见书移送的机关是()
某妇女,50岁,性交后血性白带3个月,查宫颈肥大糜烂Ⅱ°,宫颈刮片细胞学为巴氏Ⅱ级,宫颈活检为原位癌。
骨关节结核最常见的发病部位是
甲房地产开发企业(以下简称甲企业)在市区开发建设一居住区,紧邻一所中学和一座公路高架桥。该居住区用地面积为25万平方米,绿地面积为10万平方米,其中公共绿地面积为8万平方米,住宅楼的供水管网分为上下两个区,下区由室外配水管网直接供水,上区由水泵加压后直接与
“教学相长”最早出现在我国的()著作中。
下列哪种记忆类型符合俗语所说的“良言一句三冬暖,恶语伤人恨不休”()
设矩阵有一个特征值为3.求可逆矩阵P,使得(AP)T(AP)为对角矩阵.
下列说法正确的是
A、Youshouldthinkaboutthefuturewhenyoumove.B、Movingbringsopportunitiesaswellassomeproblems.C、Husbandandwifedo
最新回复
(
0
)