People gathered on a spot in front of the town hall of Rjukan, Norway, last week, where mirrors have focused sunlight. AFP/Getty Images
Archimedes would be proud of the town of Rjukan, Norway. So would Sam Eyde.
Rjukan, home to about 3,500 residents and situated about 70 miles west of the capital, Oslo, has installed a trio of giant mountaintop mirrors to focus light into the valley town’s square during the cold (and dark) winter months.
The three 550-square-foot mirrors, built at a cost of $825,000, couldn’t stay focused for long without sensors and computer control to follow the sunlight and keep it aimed at the center of town. So, in Eyde’s time the project wasn’t practical. Instead, in 1928, the town built a cable car leading to the top of a mountain so residents could take a short ride to the warming sunlight.
“The square will become a sunny meeting place in a town otherwise in shadow,” according to the project’s official website.
Here’s a video from Reuters that gives some details:
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