[简答题]solar photovoltaics

[单项选择]Solar Power without Solar Cells 　　A dramatic and surprising magneticeffect of light discovered by University of Michigan1researcherscould lead to solar power without traditional semiconductor-based solar cells. 　　The researchers found a way to make an“optical 　51　,” said Stephen Rand, a professor in thedepartments of Electrical Engineering and Computer Science, Physics and AppliedPhysics. 　　Light has electric and magnetic 　52　.Until now, scientists thought the effect of the magnetic field were so weakthat they could be 　 53　. What Rand and his colleagues found isthat at the right intensity, when light is traveling through a material thatdoes not 　 54　electricity, the light field cangenerate magnetic effects that are 100 million times stronger than previouslyexpected. Under these circumstances, the magnetic effects develop strength 　55　toa strong electric effect. 　　“This could lead to a new kind of solarcell without semiconductors and without absorption to produce charge separation,
A. disc
B. fiber
C. instrument
D. battery

[单项选择]Solar Trophy: Call to Competitors
The Solar Trophy, inaugurated one year ago with only three boats completing an ocean crossing from Cape Town to Hobart, has established itself as a truly unique event in the calendar of ocean racing. Each of the 20 meter boats was powered only by the energy provided by solar panels. The race was won by a four-man team captained by Hans Larssen from Stockholm aboard lcarus 2.
Following the success of the first race, the race committee has decided to hold the event every three years. Teams wishing to participate in the next edition of the race are hereby invited to submit their applications. The full application package and race regulations can be downloaded from the Solar Trophy website (www://solartrophy.org).
The organizers would like to remind applicants that only solar-powered yachts are authorized to compete and that all vessels must correspond to the specifications in the race regulations. If you have additional que
A. Ocean liners
B. Inflatable boats
C. Sailboats
D. Solar-powered yachts