Rand and Fisher found that under the right circumstances and in right types of materials, the lights magnetic field can also create optical rectification. The light must be shone through a 59 that does not 60 electricity, such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isnt this intense 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 as. 61 in producing charge separation as laser light is, Fisher said.
This new 62 could make solar power cheaper, the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in 63 solar power to useable energy. Thats equivalent to todays commercial-grade solar cells.
To manufacture 64 solar cells, you have to do extensive semiconductor processing, Fisher said. All we would need are lenses to focus the light and a fiber to guide it. Glass works for 65 . Its already made in bulk, and it doesnt require as much processing. Transparent ceramics might be even better.
51. A. microscope B. instrument C. fiber D. battery
52. A. modifications B. effects C. applications D. results
53. A. frequently B. privately C. previously D. formally
54. A. Under B. At C. On D. Over
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